Doug's 1st Movie (1999)
Doug's 1st Movie (at times promoted as The First Doug Movie Ever) is a 1999 animated film based on the Disney version of Nickelodeon's Doug television series. The film was directed by Maurice Joyce, and stars the regular television cast of Tom McHugh, Fred Newman, Chris Phillips, Constance Shulman, Frank Welker, Alice Playten, and Guy Hadley. It was produced by Jumbo Pictures and Disney Television Animation, and released by Walt Disney Pictures on March 26, 1999.
More at Wikipedia.