A spokesperson for the 39 year-old star has confirmed to People magazine that Ruffalo and his wife are the happy parents of a little girl, who was born in Los Angeles. We do not yet know the name of the new baby, who has a six year-old brother, Keen, and a two year-old sister, Bella.
Ruffalo and Coigney, who own the boutique Kaviar and Kind, were married in 2006.
Ruffalo will share the screen with Joaquin Phoenix and Jennifer Connelly in the film Reservation Road.