TORONTO (Reuters) - Woody Harrelson is winning praise for an intense performance as dirty cop in Rampart, but the former Cheers star is trying hard not to dwell on the prospect of a third Oscar nomination. Its always nice to get an invite to the party, but we cant count on those things, he told reporters at the Toronto Film Festival. I cant really think about those things. On the other hand I cant think about anything else. Rampart, which had its world debut at the Toronto International Film Festival on Saturday, reteams Harrelson with The Messenger director Oren Moverman. Harrelson received an Oscar nomination for that movie, playing a U.S. soldier who notifies families when their loved ones are killed.