London: Pop superstar Justin Timberlake has offered to perform at talk show host Ellen DeGeneres' wedding and said he would compose a song specially for the occasion.

After the state of California overturned the ban on same-sex marriage Thursday, DeGeneres announced on her show that she would wed her long time partner Portia De Rossi.

Timberlake was among the first to congratulate her as he appeared on the show where she made the announcement, contactmusic.com reported.

But Timberlake shrugged off a suggestion that he would marry his girlfriend Jessica Biel as a double wedding.

He said: “No... but I'll sing at your wedding. You should have an original wedding song, I think it's only fitting. (Write down) everything you want to say to Portia and everything you (Portia) wanna say to Ellen... and I'll put it to music and it'll be amazing.”