Keegan Phillip Allen (born July 22, 1989) is an American actor, photographer, author and musician. Allen is known for his main role as Toby Cavanaugh on the Freeform series Pretty Little Liars.
Allen was born and raised in California, the son of actor Phillip R. Allen and artist Joan Snyder Allen. In 2009, he graduated with a Bachelor of Fine Arts degree from American Musical and Dramatic Academy. Allen is Jewish.
Allen's passion in his younger years tended towards photography, cinematography and other roles behind the camera. However, at age 13, he landed his first paid job for a small, non-speaking role in a documentary for Animal Planet. In 2010, Allen appeared in an episode of Nickelodeon's TV show Big Time Rush. Shortly after, he began playing the recurring role of Toby Cavanaugh, the love interest of Spencer Hastings (Troian Bellisario), on the ABC Family (later Freeform) mystery series Pretty Little Liars.