Taylor-Wood and Johnson's new baby
Sam Taylor-Wood and Aaron Johnson have become parents to their second child together.
The baby girl, who was born on January 18, has been named Romy Hero Johnson.
Their spokesperson said: "Sam Taylor-Wood and Aaron Johnson are the proud parents of Romy Hero Johnson, who was born at home in London on January 18. Both mother and daughter are well."
Romy joins big sister 18-month-old Wylda Rae and Sam's older daughters Anjelica,14, and Jessie, five, from her previous marriage to art dealer Jay Jopling.
Kick-Ass star Aaron, 21, and fiancee Sam, 44, met when she cast him as John Lennon in biopic Nowhere Boy in 2009, in which Anjelica and Jessie made a cameo as Lennon's younger sisters. Despite the 23-year age gap the couple became engaged after just a few months dating.
Sam said in an interview last year: "Aaron, almost before anything started between us, said he wanted kids. He was very clear about wanting a family.
"We hardly go out now - it's just us. Aaron has brought a set of values I didn't even know I was looking for - family values.
"He is more grounded. He has been getting work offers which he has turned down because he wants to be here for the crucial first months of Wylda's life."
She defended their age gap saying: "In the old days, 'controversial' in a relationship meant same-sex or mixed races. Now, it is a woman with a younger man. That would not happen with a man."
Aaron has said: "I'm an old soul and she's a young soul. We don't see an age gap, we just see each other."