[1] Blackwood played Alexis in the 2015 episode "Preparing the Weapon" of the crowdfunded[3] TV series Cops and Monsters.

[4] In 2018 she appeared in a short film called Sundown directed by Ryan Hendrick.

[5] She played the young Amelia Pond in several Doctor Who episodes; "The Eleventh Hour", "The Big Bang", "Let's Kill Hitler", and "The God Complex", with footage of her briefly reused in "The Angels Take Manhattan".

She is the cousin of Karen Gillan, who portrayed the adult Amy Pond, although they had never met before Blackwood was cast.

[9] In 2020, she appeared in the romantic comedy film Lost at Christmas,[10][11] which also featured Doctor Who actors Sylvester McCoy and Frazer Hines.