Stanley Tucci and Felicity Blunt have star-studded formal wedding ceremony

Felicity Blunt and Stanley Tucci attends HBO's "Boardwalk Empire" season three premiere at Ziegfeld Theater on Sept. 5, 2012, in New York. / Getty

Stanley Tucci and Felicity Blunt have said "I do" again.

The actor and literary agent quietly married weeks ago, but exchanged vows for a second time over the weekend at a formal wedding in London, according to reports.

• Pictures: Stanley Tucci

Steve Buscemi was Tucci's best man, People reports, and the bride's sister, actress Emily Blunt, was a bridesmaid. The ceremony took place on Saturday at Middle Temple Hall, with the bride wearing a Nanette Lepore dress and the groom wearing a Hugo Boss tuxedo.

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Other celebrity guests reportedly included John Krasinski (Emily Blunt's husband), Oliver Platt, Meryl Streep, Patricia Clarkson, Julianne Moore and Colin Firth.

"Saturday was more of a celebration of their marriage since they were already wed," a source told Us Weekly of Tucci and his wife. "They had always planned on doing this."

This is the first marriage for Blunt, and second for Tucci. He has three children with his first wife, Kate, who died in 2009 after battling breast cancer.