Kate Beckinsale was in proud mummy mode as she posted a sweet message online to mark her daughter’s 18th birthday.

The Underworld actress shared a throwback baby photo of Lily – her daughter with her ex Michael Sheen – and wrote: “Nothing has been better in my life than being your mama.” Awww!

Kate wrote: “18 and now you’re in the big girl shoes for real. I love you so much @lily_beckinsale.

“Nothing has been better in my life than being your mama.

“Happy happy happy birthday to my favourite, funniest best person in the world.”

And she joked: “Ps we will obviously get you better shoes those are hideous I don’t know what I was thinking.”

Kate then posted pictures of both herself and Lily when they were little, with similar expressions on their faces.

She wrote: “It is comforting to know that the family ‘I am moments from throwing an elbow’ face has been successfully passed down through the generations @kateandlily.”