The 'Love Actually' star, 57, tied the knot with his Swedish girlfriend Anna Eberstein, 39, in London on Friday (local time), reports E! Online.
The wedding follows just days after Eberstein and Grant's engagement was revealed.
Eberstein, a television producer of Swedish descent, has a five-year-old son John Mungo, a two-year-old daughter and a mere months-old daughter with Grant.
The 'Notting Hill' star has five children in total, including two - Tabitha and Felix - with former partner Tinglan Hong.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)