diff --git a/README.md b/README.md
index e16d31f9b..dbb15d0bb 100644
--- a/README.md
+++ b/README.md
@@ -496,6 +496,8 @@ The following inputs can be used as `step.with` keys
 | `aws_ecr_repo_policy_input` | String | The JSON policy to apply to the repository. If defined overrides the default policy' |
 | `aws_ecr_repo_read_arn` | String | The ARNs of the IAM users/roles that have read access to the repository. (Comma separated list)' |
 | `aws_ecr_repo_write_arn` | String | The ARNs of the IAM users/roles that have read/write access to the repository. (Comma separated list)' |
+| `aws_ecr_repo_read_external_aws_account`| String | Comma separated list of AWS Accounts IDs that will be provided with read access to the registry. |
+| `aws_ecr_repo_write_external_aws_account`| String | Comma separated list of AWS Accounts IDs that will be provided with write access to the registry. |
 | `aws_ecr_repo_read_arn_lambda` | String | The ARNs of the Lambda service roles that have read access to the repository. (Comma separated list)' |
 | `aws_ecr_lifecycle_policy_input` | JSON | The policy document. This is a JSON formatted string. See more details about [Policy Parameters](http://docs.aws.amazon.com/AmazonECR/latest/userguide/LifecyclePolicies.html#lifecycle_policy_parameters) in the official AWS docs' |
 | `aws_ecr_public_repo_catalog` | String | Catalog data configuration for the repository. Defaults to `{}`.' |
diff --git a/action.yaml b/action.yaml
index 43a8ef145..7caf8b74d 100644
--- a/action.yaml
+++ b/action.yaml
@@ -987,6 +987,12 @@ inputs:
   aws_ecr_repo_write_arn:
     description: 'The ARNs of the IAM users/roles that have read/write access to the repository. (Comma separated list)'
     required: false
+  aws_ecr_repo_read_external_aws_account:
+    description: 'The ARNs of the external AWS accounts that have read access to the repository'
+    required: false
+  aws_ecr_repo_write_external_aws_account:
+    description: 'The ARNs of the external AWS accounts that have write access to the repository'
+    required: false
   aws_ecr_repo_read_arn_lambda:
     description: 'The ARNs of the Lambda service roles that have read access to the repository. (Comma separated list)'
     required: false
@@ -1547,6 +1553,8 @@ runs:
         AWS_ECR_REPO_POLICY_INPUT: ${{ inputs.aws_ecr_repo_policy_input }}
         AWS_ECR_REPO_READ_ARN: ${{ inputs.aws_ecr_repo_read_arn }}
         AWS_ECR_REPO_WRITE_ARN: ${{ inputs.aws_ecr_repo_write_arn }}
+        AWS_ECR_REPO_READ_EXTERNAL_AWS_ACCOUNT: ${{ inputs.aws_ecr_repo_read_external_aws_account }}
+        AWS_ECR_REPO_WRITE_EXTERNAL_AWS_ACCOUNT: ${{ inputs.aws_ecr_repo_write_external_aws_account }}
         AWS_ECR_REPO_READ_ARN_LAMBDA: ${{ inputs.aws_ecr_repo_read_arn_lambda }}
         AWS_ECR_LIFECYCLE_POLICY_INPUT: ${{ inputs.aws_ecr_lifecycle_policy_input }}
         AWS_ECR_PUBLIC_REPO_CATALOG: ${{ inputs.aws_ecr_public_repo_catalog }}
diff --git a/operations/_scripts/generate/generate_vars_terraform.sh b/operations/_scripts/generate/generate_vars_terraform.sh
index 048907222..f36fd40e2 100644
--- a/operations/_scripts/generate/generate_vars_terraform.sh
+++ b/operations/_scripts/generate/generate_vars_terraform.sh
@@ -381,6 +381,8 @@ if [[ $(alpha_only "$AWS_ECR_REPO_CREATE") == true ]]; then
   aws_ecr_repo_policy_input=$(generate_var aws_ecr_repo_policy_input $AWS_ECR_REPO_POLICY_INPUT)
   aws_ecr_repo_read_arn=$(generate_var aws_ecr_repo_read_arn $AWS_ECR_REPO_READ_ARN)
   aws_ecr_repo_write_arn=$(generate_var aws_ecr_repo_write_arn $AWS_ECR_REPO_WRITE_ARN)
+  aws_ecr_repo_read_external_aws_account=$(generate_var aws_ecr_repo_read_external_aws_account $AWS_ECR_REPO_READ_EXTERNAL_AWS_ACCOUNT)
+  aws_ecr_repo_write_external_aws_account=$(generate_var aws_ecr_repo_write_external_aws_account $AWS_ECR_REPO_WRITE_EXTERNAL_AWS_ACCOUNT)
   aws_ecr_repo_read_arn_lambda=$(generate_var aws_ecr_repo_read_arn_lambda $AWS_ECR_REPO_READ_ARN_LAMBDA)
   aws_ecr_lifecycle_policy_input=$(generate_var aws_ecr_lifecycle_policy_input $AWS_ECR_LIFECYCLE_POLICY_INPUT)
   aws_ecr_public_repo_catalog=$(generate_var aws_ecr_public_repo_catalog $AWS_ECR_PUBLIC_REPO_CATALOG)
@@ -743,6 +745,8 @@ $aws_ecr_repo_policy_create
 $aws_ecr_repo_policy_input
 $aws_ecr_repo_read_arn
 $aws_ecr_repo_write_arn
+$aws_ecr_repo_read_external_aws_account
+$aws_ecr_repo_write_external_aws_account
 $aws_ecr_repo_read_arn_lambda
 $aws_ecr_lifecycle_policy_input
 $aws_ecr_public_repo_catalog
diff --git a/operations/deployment/terraform/aws/aws_variables.tf b/operations/deployment/terraform/aws/aws_variables.tf
index adac2be2b..2071fbd43 100644
--- a/operations/deployment/terraform/aws/aws_variables.tf
+++ b/operations/deployment/terraform/aws/aws_variables.tf
@@ -1718,6 +1718,18 @@ variable "aws_ecr_lifecycle_policy_input" {
   default     = ""
 }
 
+variable "aws_ecr_repo_read_external_aws_account" {
+  description = "The ARNs of the external AWS accounts that have read access to the repository"
+  type        = string
+  default     = ""
+}
+
+variable "aws_ecr_repo_write_external_aws_account" {
+  description = "The ARNs of the external AWS accounts that have write access to the repository"
+  type        = string
+  default     = ""
+}
+
 variable "aws_ecr_public_repo_catalog" {
   description = "Catalog data configuration for the repository"
   type        = any
diff --git a/operations/deployment/terraform/aws/bitovi_main.tf b/operations/deployment/terraform/aws/bitovi_main.tf
index eceb99ff1..cfaa57986 100644
--- a/operations/deployment/terraform/aws/bitovi_main.tf
+++ b/operations/deployment/terraform/aws/bitovi_main.tf
@@ -600,6 +600,8 @@ module "aws_ecr" {
   aws_ecr_repo_policy_input                 = var.aws_ecr_repo_policy_input
   aws_ecr_repo_read_arn                     = var.aws_ecr_repo_read_arn
   aws_ecr_repo_write_arn                    = var.aws_ecr_repo_write_arn
+  aws_ecr_repo_read_external_aws_account    = var.aws_ecr_repo_read_external_aws_account
+  aws_ecr_repo_write_external_aws_account   = var.aws_ecr_repo_write_external_aws_account
   aws_ecr_repo_read_arn_lambda              = var.aws_ecr_repo_read_arn_lambda
   aws_ecr_lifecycle_policy_input            = var.aws_ecr_lifecycle_policy_input
   aws_ecr_public_repo_catalog               = var.aws_ecr_public_repo_catalog
diff --git a/operations/deployment/terraform/modules/aws/ecr/aws_ecr_policies.tf b/operations/deployment/terraform/modules/aws/ecr/aws_ecr_policies.tf
index 44105d1f4..a11f557cb 100644
--- a/operations/deployment/terraform/modules/aws/ecr/aws_ecr_policies.tf
+++ b/operations/deployment/terraform/modules/aws/ecr/aws_ecr_policies.tf
@@ -5,6 +5,8 @@ locals {
     aws_ecr_repo_read_arn = var.aws_ecr_repo_read_arn != "" ? [for n in split(",", var.aws_ecr_repo_read_arn) : (n)] : []
     aws_ecr_repo_write_arn = var.aws_ecr_repo_write_arn != "" ? [for n in split(",", var.aws_ecr_repo_write_arn) : (n)] : []
     aws_ecr_repo_read_arn_lambda = var.aws_ecr_repo_read_arn_lambda != "" ? [for n in split(",", var.aws_ecr_repo_read_arn_lambda) : (n)] : []
+    aws_ecr_repo_read_external_aws_account = var.aws_ecr_repo_read_external_aws_account != "" ? [for n in split(",", var.aws_ecr_repo_read_external_aws_account) : "arn:${data.aws_partition.current.partition}:iam::${n}:root"] : []
+    aws_ecr_repo_write_external_aws_account = var.aws_ecr_repo_write_external_aws_account != "" ? [for n in split(",", var.aws_ecr_repo_write_external_aws_account) : "arn:${data.aws_partition.current.partition}:iam::${n}:root"] : []
 }
 
 # Policy used by both private and public repositories
@@ -129,4 +131,85 @@ data "aws_iam_policy_document" "repository" {
       ]
     }
   }
+
+  dynamic "statement" {
+    for_each = length(local.aws_ecr_repo_write_arn) > 0 && var.aws_ecr_repo_type == "public" ? [local.aws_ecr_repo_write_arn] : []
+
+    content {
+      sid = "ReadWrite"
+
+      principals {
+        type        = "AWS"
+        identifiers = statement.value
+      }
+
+      actions = [
+        "ecr-public:BatchCheckLayerAvload",
+        "ecr-public:CompleteLayerUpload",
+        "ecr-public:InitiateLayerUpload",
+        "ecr-public:PutImage",
+        "ecr-public:UploadLayerPart",
+      ]
+    }
+  }
+
+  dynamic "statement" {
+    for_each = length(local.aws_ecr_repo_read_external_aws_account) > 0 && var.aws_ecr_repo_type == "private" ? [local.aws_ecr_repo_read_external_aws_account] : []
+
+    content {
+      sid = "ExternalAccountReadOnly"
+
+      principals {
+        type        = "AWS"
+        identifiers = statement.value
+      }
+
+      actions = [
+        "ecr:GetAuthorizationToken",
+        "ecr:BatchCheckLayerAvailability",
+        "ecr:BatchGetImage",
+        "ecr:DescribeImageScanFindings",
+        "ecr:DescribeImages",
+        "ecr:DescribeRepositories",
+        "ecr:GetDownloadUrlForLayer",
+        "ecr:GetLifecyclePolicy",
+        "ecr:GetLifecyclePolicyPreview",
+        "ecr:GetRepositoryPolicy",
+        "ecr:ListImages",
+        "ecr:ListTagsForResource",
+      ]
+    }
+  }
+
+  dynamic "statement" {
+    for_each = length(local.aws_ecr_repo_write_external_aws_account) > 0 && var.aws_ecr_repo_type == "private" ? [local.aws_ecr_repo_write_external_aws_account] : []
+
+    content {
+      sid = "ExternalAccountReadWrite"
+
+      principals {
+        type        = "AWS"
+        identifiers = statement.value
+      }
+
+      actions = [
+        "ecr:GetAuthorizationToken",
+        "ecr:BatchCheckLayerAvailability",
+        "ecr:BatchGetImage",
+        "ecr:DescribeImageScanFindings",
+        "ecr:DescribeImages",
+        "ecr:DescribeRepositories",
+        "ecr:GetDownloadUrlForLayer",
+        "ecr:GetLifecyclePolicy",
+        "ecr:GetLifecyclePolicyPreview",
+        "ecr:GetRepositoryPolicy",
+        "ecr:ListImages",
+        "ecr:ListTagsForResource",
+        "ecr:PutImage",
+        "ecr:InitiateLayerUpload",
+        "ecr:UploadLayerPart",
+        "ecr:CompleteLayerUpload",
+      ]
+    }
+  }
 }
\ No newline at end of file
diff --git a/operations/deployment/terraform/modules/aws/ecr/aws_ecr_vars.tf b/operations/deployment/terraform/modules/aws/ecr/aws_ecr_vars.tf
index 100ed3fa5..33c24667d 100644
--- a/operations/deployment/terraform/modules/aws/ecr/aws_ecr_vars.tf
+++ b/operations/deployment/terraform/modules/aws/ecr/aws_ecr_vars.tf
@@ -15,6 +15,8 @@ variable "aws_ecr_repo_policy_create" {}
 variable "aws_ecr_repo_policy_input" {}
 variable "aws_ecr_repo_read_arn" {}
 variable "aws_ecr_repo_write_arn" {}
+variable "aws_ecr_repo_read_external_aws_account" {}
+variable "aws_ecr_repo_write_external_aws_account" {}
 variable "aws_ecr_repo_read_arn_lambda" {}
 variable "aws_ecr_lifecycle_policy_input" {}
 variable "aws_ecr_public_repo_catalog" {}