Twitter said in September that it would add a way for users to authenticate non-fungible tokens (NFT), and now the feature is live — if you pay for a $2.99 Twitter Blue subscription and are using an iOS device, you can now use an NFT as your profile picture.

At launch, Twitter is supporting several crypto wallets that users can connect to their profiles and verify that their tokens are of the non-fungible variety, such as Argent, Coinbase Wallet, Ledger Live, MetaMask, Rainbow, and Trust Wallet.

NFTs allow you to buy and sell ownership of unique digital items and keep track of who owns them using the blockchain.