When Uma Thurman split with financier Arpad Busson, in 2009, no one expected they’d reconcile — let alone have a baby together.

But her representative reports the 42-year-old actress gave birth Sunday to her third child — a little girl, fathered by Busson. The baby’s name was not released.

Thurman’s older children with ex-husband Ethan Hawke are said to be “over the moon,” a source said Monday.

Busson has two sons with Elle Macpherson.

Contributing: AP