When Anna Friel isn't on set playing punchy roles in big TV dramas (keep an eye out for her devastating next project, Unforgivable), she's free to unwind away from the cameras with her family. Last week, for instance, she celebrated her daughter Gracie's birthday by sharing a series of photographs with a sweet message on Instagram.

What we weren't prepared for, was just how alike Anna and 20-year-old Gracie look. In the first image in a carousel of photos and videos, Anna and Gracie stand in front of a tree with almost identical long, wavy brunette hair. The pair are joined by Gracie's dad - Harry Potter star David Thewlis. The actor played Professor Lupin in the wizarding franchise, and he and Anna were together for nine years, having Gracie in 2005.

The trio celebrated the occasion together, with Gracie and David seen holding 'twenty' balloons in a clip. Other shots show Anna watching her daughter playing guitar, and friends singing happy birthday as Gracie waits to blow out the candles.

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Anna penned a tribute to her 'darling Gracie' to mark the special occasion, saying she and David were 'the luckiest parents' and that their daughter made them 'proud everyday.' Anna praised Gracie's 'beautiful kind soul, your intelligence, your creativity, your understanding your amazing mind blowing talent your passion for everything in life,' as well as many other qualities, and thanked her for a 'wonderful decade' saying 'here's to the next'.

Earlier this month, another star penned a similarly emotional message to their daughter on a special occasion. Myleene Klass took to Instagram to celebrate her daughter Ava's high school graduation with a moving caption about Ava's achievements. She also shouted out other single mothers working hard to raise their own children.