Aaron Johnson and Sam Taylor-Wood are expecting

Sam Taylor-Wood and Aaron Johnson © Eric Charbonneau/WireImage

Kick-Ass star Aaron Johnson and his fiancée, filmmaker Sam Taylor-Wood are expecting their second child.

The relationship between 21-year old Aaron and 44-year old Sam raised some eyebrows, because of their 23-year age difference. Aaron has defended their relationship in the past by saying, "I've got a wonderful woman. I'm an old soul and she's a young soul." The couple met on the set off Nowhere Boy in 2009.

The new baby will join daughter Wylda Rae, who just turned one, and Angelica, 14, and Jessie Phoenix, 4, Sam's children from her first marriage to art dealer Jay Jopling.