Kiefer Sutherland is dating Sofia Karstens.

The 24: Live Another Day actor is said to have been spending a lot of time with the 37-year-old actress, including a recent trip to New York, and they are "really happy" with one another. "They are really happy together," a source told People.

Kiefer was previously married to Camelia Kath - with whom he has daughter Sarah and stepdaughter Michelle - and Elizabeth Kelly Winn, while Sofia married Jason London in 2011, but they filed for legal separation in February this year.