Scarlett Johansson can’t get ex-boyfriend Josh Hartnett out of her mind – she has just bought a portrait of music legend Chet Baker, who the actor will play in a new film.

The actress, who is now dating another actor, Ryan Reynolds, tracked down a William Claxton photograph of the late trumpeter to Los Angeles art-space Morrison Hotel Gallery and bought it.

A source tells WENN, “She knew exactly what she wanted and explained she had been looking for the print for some time.”

Hartnett will play Baker in new movie “The Prince Of Cool.”