Uma Thurman is pregnant.

The 'Smash' actress and her boyfriend ARPAD BUSSON have confirmed to People magazine that they are expecting their first child together after reuniting last year following a split in November 2009.

Uma already has 13-year-old daughter Maya and 10-year-old son Levon, with ex-husband Ethan Hawke while businessman Arpad has sons Arpad Flynn Alexander, 14 and Aurelius Cy Andrea, eight, from a previous relationship with supermodel Elle Macpherson.

A friend of Uma's told Life & Style magazine: ''Yes, Uma is pregnant! 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.''

The couple are said to be ''excited'' about the news, with the baby thought to be due in late summer 2012.

The insider added: ''She's excited. She's happy and just a few months along right now. She's due in late, late summer.''