Freddie began his acting career in 2008 appearing a cameo role in the paranormal series Medium playing a Senior Boy which is uncredited during that episode.
He appeared in the short film titled Weak Species co-starring Erik Smith and in the film One Wish released in 2010.
On January 9, 2011 it was reported that he had joined the cast of the CW series 90210, in a recurring role as Marco, a gay soccer player who will become involved with Teddy Montgomery. He appeared in 5 episodes of the third season including the season finale. On July 17, 2011 The CW announced that Freddie Smith, Marco, will not return in season 4 as Teddy's boyfriend, having broken up with him over the summer.
Besides 90210, he took up the role of Jackson "Sonny" Kiriakis developed by Leah Laiman, the first openly gay character in the hit daytime soap opera Days of our Lives.