diff --git a/packages/bridge-controller/CHANGELOG.md b/packages/bridge-controller/CHANGELOG.md
index 6b6e0dac0ca..607be3a5a3d 100644
--- a/packages/bridge-controller/CHANGELOG.md
+++ b/packages/bridge-controller/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add `SEI` network support ([#5695](https://github.com/MetaMask/core/pull/5695))
+  - Add `SEI` into constants `ALLOWED_BRIDGE_CHAIN_IDS`, `SWAPS_TOKEN_OBJECT` and `NETWORK_TO_NAME_MAP`
+
 ### Changed
 
 - Bump `@metamask/multichain-network-controller` dependency to `^0.5.1` ([#5678](https://github.com/MetaMask/core/pull/5678))
diff --git a/packages/bridge-controller/src/constants/bridge.ts b/packages/bridge-controller/src/constants/bridge.ts
index 4fc7823b34a..6aa657cb5d4 100644
--- a/packages/bridge-controller/src/constants/bridge.ts
+++ b/packages/bridge-controller/src/constants/bridge.ts
@@ -17,6 +17,7 @@ export const ALLOWED_BRIDGE_CHAIN_IDS = [
   CHAIN_IDS.ARBITRUM,
   CHAIN_IDS.LINEA_MAINNET,
   CHAIN_IDS.BASE,
+  CHAIN_IDS.SEI,
   SolScope.Mainnet,
 ] as const;
 
diff --git a/packages/bridge-controller/src/constants/chains.ts b/packages/bridge-controller/src/constants/chains.ts
index 790e9a8ccdf..e0b855f1266 100644
--- a/packages/bridge-controller/src/constants/chains.ts
+++ b/packages/bridge-controller/src/constants/chains.ts
@@ -123,6 +123,7 @@ export const INK_DISPLAY_NAME = 'Ink Mainnet';
 export const SONEIUM_DISPLAY_NAME = 'Soneium Mainnet';
 export const MODE_SEPOLIA_DISPLAY_NAME = 'Mode Sepolia';
 export const MODE_DISPLAY_NAME = 'Mode Mainnet';
+export const SEI_DISPLAY_NAME = 'Sei Network';
 
 export const NETWORK_TO_NAME_MAP = {
   [NETWORK_TYPES.GOERLI]: GOERLI_DISPLAY_NAME,
@@ -154,4 +155,5 @@ export const NETWORK_TO_NAME_MAP = {
   [CHAIN_IDS.METACHAIN_ONE]: METACHAIN_ONE_DISPLAY_NAME,
   [CHAIN_IDS.LISK]: LISK_DISPLAY_NAME,
   [CHAIN_IDS.LISK_SEPOLIA]: LISK_SEPOLIA_DISPLAY_NAME,
+  [CHAIN_IDS.SEI]: SEI_DISPLAY_NAME,
 } as const;
diff --git a/packages/bridge-controller/src/constants/tokens.ts b/packages/bridge-controller/src/constants/tokens.ts
index 2e65e12dee1..0dac89c203a 100644
--- a/packages/bridge-controller/src/constants/tokens.ts
+++ b/packages/bridge-controller/src/constants/tokens.ts
@@ -53,6 +53,7 @@ const CURRENCY_SYMBOLS = {
   MOONRIVER: 'MOVR',
   ONE: 'ONE',
   SOL: 'SOL',
+  SEI: 'SEI',
 } as const;
 
 const ETH_SWAPS_TOKEN_OBJECT = {
@@ -139,6 +140,14 @@ const SOLANA_SWAPS_TOKEN_OBJECT = {
   iconUrl: '',
 } as const;
 
+const SEI_SWAPS_TOKEN_OBJECT = {
+  symbol: CURRENCY_SYMBOLS.SEI,
+  name: 'Sei',
+  address: DEFAULT_TOKEN_ADDRESS,
+  decimals: 18,
+  iconUrl: '',
+} as const;
+
 const SWAPS_TESTNET_CHAIN_ID = '0x539';
 
 export const SWAPS_CHAINID_DEFAULT_TOKEN_MAP = {
@@ -154,6 +163,7 @@ export const SWAPS_CHAINID_DEFAULT_TOKEN_MAP = {
   [CHAIN_IDS.ZKSYNC_ERA]: ZKSYNC_ERA_SWAPS_TOKEN_OBJECT,
   [CHAIN_IDS.LINEA_MAINNET]: LINEA_SWAPS_TOKEN_OBJECT,
   [CHAIN_IDS.BASE]: BASE_SWAPS_TOKEN_OBJECT,
+  [CHAIN_IDS.SEI]: SEI_SWAPS_TOKEN_OBJECT,
   [SolScope.Mainnet]: SOLANA_SWAPS_TOKEN_OBJECT,
 } as const;
 
@@ -176,4 +186,5 @@ export const SYMBOL_TO_SLIP44_MAP: Record<
   BNB: 'slip44:714',
   AVAX: 'slip44:9000',
   TESTETH: 'slip44:60',
+  SEI: 'slip44:19000118',
 };