London, July 17 : Uma Thurman welcomed her third child with financier boyfriend Arpad Busson on Sunday.

According to America''s US Weekly, the 42-year-old is already a mum to Maya, 13, and Levon, 10 with ex-husband Ethan Hawke.

Busson has two sons from his relationship with model Elle Macpherson.

Thurman and Busson, began dating in 2007 and endured a brief split in 2009.

Sources claim that the pair had not planned to start a family together, but are thrilled at the news.

“Uma was definitely not planning on having another kid. It was a surprise,” the Daily Mail quoted a source as telling the magazine in February.

“But she''s over the moon about it, very excited,” the source added. (ANI)