Keeley Hawes and her husband Matthew MacFadyen celebrated their 20th wedding anniversary on Tuesday, 29 October, sharing a series of adorable black and white photos on Instagram.The 48 year old actress and the 50 year old Succession star looked as smitten as ever in the snaps. Keeley was seen looking elegant in an embellished shift dress while sitting next to Matthew, who looked dapper in a charcoal suit and white shirt.The actress simply captioned the post '20' with a love heart emoji, prompting fans to flood the comments with congratulations.