Uma Thurman is pregnant with her third child and first baby with financier boyfriend, Arpad Busson, her rep told multiple sources.

The 41-year-old Kill Bill actress was seen at New York Fashion Week earlier this month with no noticeable baby bump but her rep confirmed to People Magazine that she is expecting.

Yes, Uma is pregnant! a friend of Thurman's also told Life & Style. She hasn't announced it yet, but a lot of her friends were asking her because they could tell the difference when they saw her at New York Fashion Week. She's usually so skinny, but now she has the cutest little bump and a glow about her.

Thurman attended the Tommy Hilfiger show on Feb. 12 wearing loose fitting clothing and posing with her hand over her belly while seated front row.

Thurman began dating 49-year-old Busson in 2007. After a brief split, calling off their engagement due to long-distance, the couple has been dating happily since 2009.

I have something I would really like to express about my love life, she told Harper's Bazaar in January. 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.

Thurman already has two children - Maya, 13, and Levon, 10 - with ex-husband Ethan Hawke. While they both have custody of the children, Hawke married Ryan Shawhughes, formerly the couple's nanny, in 2008 and has two children with Shawhughes: Clementine, 3, and 6-month-old Indiana.

Busson also has children of his own -- Arpad Flynn Alexander Busson and Aurelius Cy Andrea Busson, with former girlfriend Elle Macpherson.

Uma Thurman will star in the upcoming film, Bel Ami, with Robert Pattinson.

Robert Pattinson is, I think, going to be a really serious actor, she said. I think he's incredibly concrete in his presence on the set and obviously is very handsome. [He] is a very nice person, and he's sensitive. He's present. ... He's a really good actor.

Bel Ami will be released in theaters in March.