It's not the first time the duo have been pictured together. Last week they enjoyed each other's company at a local farmer's market. At one point, the gorgeous brunette beauty and Ian hugged as they checked out the fresh produce on show.
Ian has been single since May 2013, when he split from Vampire Diaries co-star Nina Dobrev after three years of dating. However, the two remain amicable exes.
Ian and Nikki were pictured leaving the gym
Speaking to Nylon magazine following the split, Nina said: "I don't like any kind of negativity. I try to be good to everyone, whether it's a love, a friend, an ex,. I'll always try to treat people the way I want to be treated."