Robert Downey Jr. has offered his support to Fur co-star Nicole Kidman's country star husband Keith Urban as he battles his alcohol problems. Urban recently checked into rehab after revealing he'd suffered a relapse in his battle with alcoholism, and actor Downey Jr., who has fought his own addictions, wants to help.

A source reveals the star has reached out to Kidman to help her cope with her husband's issues and has offered to support the singer when he's out of rehab.

The insider says, "Robert knows exactly what Keith is going through... He volunteered to call Keith with encouragement, but she suggested they wait until he's out (of rehab) so they can all sit down for a long talk."

(This news article provided by World Entertainment News Network)