Mila Kunis is craving burgers.

The 'Black Swan' star, who is said to be expecting her first child with Ashton Kutcher in October, has become addicted to eating burgers from UMAMI.

A source told the National Enquirer magazine: ''Since she got her baby bump, Mila's become flat-out addicted to these trendy new burgers, which cost about $15 a pop, but are truly delicious.''

The pair are reportedly expecting a baby girl and sources recently said, the 'Two and a Half Men' actor - who was previously married to Demi Moore and helped care for her three daughters, Rumer, 25, Scout and Tallulah, 20, with her ex-husband Bruce Willis - is thrilled to be having little girl as he ''got plenty of practice with Demi's girls.''

The heartthrob is taking great care of his partner during her first pregnancy, according to another insider, who revealed: ''Ashton is doting on Mils.''

The couple have yet to comment on Mila's pregnancy, but the brunette beauty proudly showed off her growing baby bump in a black dress at the MTV Movie Awards in Los Angeles on April 13.