By Kate Ward
Updated July 08, 2010 at 10:57 PM EDT

People reports that 20-year-old Kick Ass star Aaron Johnson and his fiancée, 43-year-old Sam Taylor-Wood, have welcomed a baby girl. Wylda Rae was born Wednesday in London. The couple has been together since 2009. This is the first child for Johnson and the third for Taylor-Wood — the mom also has two daughters with ex-husband Jay Jopling.