diff --git a/.changeset/hip-spoons-go.md b/.changeset/hip-spoons-go.md
new file mode 100644
index 00000000000..8c1c17844cd
--- /dev/null
+++ b/.changeset/hip-spoons-go.md
@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+Add Arc testnet to chains package
diff --git a/packages/thirdweb/src/chains/chain-definitions/arc-testnet.ts b/packages/thirdweb/src/chains/chain-definitions/arc-testnet.ts
new file mode 100644
index 00000000000..3f67513ebbb
--- /dev/null
+++ b/packages/thirdweb/src/chains/chain-definitions/arc-testnet.ts
@@ -0,0 +1,17 @@
+import { defineChain } from "../utils.js";
+
+/**
+ * @chain
+ */
+export const arcTestnet = /* @__PURE__ */ defineChain({
+  blockExplorers: [
+    {
+      name: "Arc Testnet Explorer",
+      url: "https://testnet.arcscan.app",
+    },
+  ],
+  id: 5042002,
+  name: "Arc Testnet",
+  nativeCurrency: { decimals: 6, name: "USDC", symbol: "USDC" },
+  testnet: true,
+});
diff --git a/packages/thirdweb/src/exports/chains.ts b/packages/thirdweb/src/exports/chains.ts
index 1d704d48c4c..aeb45de9a60 100644
--- a/packages/thirdweb/src/exports/chains.ts
+++ b/packages/thirdweb/src/exports/chains.ts
@@ -10,6 +10,7 @@ export { anvil } from "../chains/chain-definitions/anvil.js";
 export { arbitrum } from "../chains/chain-definitions/arbitrum.js";
 export { arbitrumNova } from "../chains/chain-definitions/arbitrum-nova.js";
 export { arbitrumSepolia } from "../chains/chain-definitions/arbitrum-sepolia.js";
+export { arcTestnet } from "../chains/chain-definitions/arc-testnet.js";
 export { assetChainTestnet } from "../chains/chain-definitions/assetchain-testnet.js";
 export { astriaEvmDusknet } from "../chains/chain-definitions/astria-evm-dusknet.js";
 export { avalanche } from "../chains/chain-definitions/avalanche.js";