2 of David and Georgia Tennant's Kids Are Working Actors — Learn More About Their Family

Doris was born on Oct. 3, 2015. In honor of her fifth birthday in 2020, Georgia shared an adorable message on Instagram, poking fun at the fact that people question the name she and David chose for her.

"Happy Birthday our darling Doris (yes we called her Doris)," she wrote. "5 years since I pulled you into this world & we've been running to keep up with you ever since. You are a force of nature and the world has a treat coming in the shape of you. #happybirthday."