Kiefer Sutherland and Sofia Karstens
Bryan Bedder/Getty; Jesse Grant/WireImage
is still an eligible bachelor.
The 24: Live Another Day
star, 47, is not dating actress Sofia Karstens, his rep tells PEOPLE, while a source adds that the two have gone out
"once or twice, but there's nothing more to it."
The two were briefly linked romantically
after spending time together in New York City, where Sutherland promoted his return to the hit series.
Karstens, 37, is legally separated from Dazed and Confused actor Jason London
, and Sutherland was previously married to Elizabeth Kelly Winn
and Camelia Kath.
The TV star will next be seen starring alongside his father, actor Donald Sutherland, in the western Forsaken