Guy Ritchie Expecting Second Child With Jacqui Ainsley

Guy Ritchie is going to be a dad for the fourth time.

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People.com reports that the 43-year-old director -- and ex-husband of Madonna -- is expecting a second child with his partner, Jacqui Ainsley. A rep for the pair confirmed the pregnancy.

But Ainsley, a 30-year-old model, had nothing to hide Wednesday night when she showed off her burgeoning belly in a black gown at the London premiere of The Dark Knight Rises.

Ritchie and Ainsley welcomed a son, Rafael, in September 2011. Ritchie has two other sons (Rocco, 11, and David, adopted from Malawi in 2008) with Madonna. He and the pop star divorced in 2008 after eight years of marriage.

Ritchie most recently directed Sherlock Holmes: A Game of Shadows, co-starring Robert Downey Jr. and Jude Law.