The McFly singer struggled to keep his emotions in check when Giovanna Falcone walked down the aisle at London`s One Marylebone earlier this month but "lost it" when his sister Carrie sang during the ceremony.
He said: "I was doing OK up until that point, but hearing my sister sing with Giovanna next to me looking so beautiful I just lost it."
Tom wasn`t the only one to cry at the wedding as Giovanna also shed a tear when her new husband gave an unusual musical speech, part of which saw him amend the lyrics to McFly`s hit `All About You` to make it about their big day, with the choir from the Sylvia Young Theatre School - where they met as teenagers - joining in for the chorus.
She said: "I was overwhelmed by Tom`s song but I didn`t start crying until the choir came in.
"That really choked me up, especially as they were all from our old school and all the same age as when Tom and I met."
It seems the pair are an emotional couple as Tom admitted they both cried when he first asked Giovanna - who he has been in a relationship with since 2003 - to marry him.
He told Britain`s OK! magazine: "We both cried during the proposal - I had a lump in my throat but I just about managed to get through it."