Uma Thurman and financier boyfriend Arpad Busson welcomed a baby girl yesterday, according to America’s Us Weekly.

No other details were immediately available.

Uma Thurman, 42, has two other children – Maya, 13, and Levon, 10 – with her ex-husband Ethan Hawke.

Arpad Busson has two sons from his relationship with model Elle Macpherson – Arpad Flynn Alexander, 14, and Aurelius Cy Andrea, 9.

Uma Thurman has given birth to her third child

Uma Thurman and Arpad Busson, 49, began dating in 2007 and endured a brief split in 2009.

Sources say the pair were 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,” a source told Us Weekly in February.

“But she’s over the moon about it, very excited.”

Uma Thurman has made it clear that she’s very much in love with Arpad.

She said last year: “I have something I would really like to express about my love life. I’m happier with it now than I’ve been in many, many years. Yes I’m trying to have as peaceful a personal life as possible.”

The couple celebrated their impending new arrival with a pink elephant-themed baby shower in New York in May.