Ephraim starred in the 2003 TV movie Hench at Home. In 2008 she starred as Wendy in the movie College Road Trip. She starred as Ali Rey in the movie Paranormal Activity 2 in 2010 and revived for the role for 2014’s Paranormal Activity: The Marked Ones. She also starred as Cricket in the 2014 film Gravy. Since 2011 Ephraim has starred as Mandy Baxter in the television series Last Man Standing. She has also appeared in episodes of the TV series Law & Order and Royal Pains.