Woody Harrelson did not have a cameo appearance in the film "Austin Powers in Goldmember". He did however appear as himself in the film "Austin Powers: The Spy Who Shagged Me".

Woodrow Tracy Harrelson (born July 23, 1961) is an American actor and playwright. He is the recipient of numerous accolades, including a Primetime Emmy Award, and has been nominated for three Academy Awards and four Golden Globe Awards. Harrelson first became known for his role as bartender Woody Boyd on the NBC sitcom "Cheers" (1985–1993), for which he won a Primetime Emmy Award for Outstanding Supporting Actor in a Comedy Series from a total of five nominations.

"Austin Powers in Goldmember" is a 2002 American spy action comedy film directed by Jay Roach. It is the third in the "Austin Powers" film series and stars Mike Myers in multiple roles including Austin Powers, Dr. Evil, Goldmember, and Fat Bastard. Myers and Michael McCullers co-wrote the screenplay, which also features co-star Beyoncé Knowles in her theatrical film debut, as well as Robert Wagner, Seth Green, Michael York, Verne Troyer, Michael Caine, Mindy Sterling and Fred Savage.

Cameo appearances were made by: Tom Cruise as Himself as Austin Powers, Danny DeVito as Himself as Mini-Me and Kevin Spacey as Himself as Dr. Evil (all appeared in the opening scene "Austinpussy")

More Info: en.wikipedia.org