Kevin Nealon has signed on to join Ashley Tisdale in Fox's adventure comedy They Came From Upstairs. According to The Hollywood Reporter, They Came From Upstairs will be produced by Barry Josephson and directed by John Schultz.

They Came From Upstairs is a story about a group of teenagers who team together to defend their Maine vacation home from an alien invasion. Nealon will star as the father, Stuart Pearson. Gillian Vigman has already been cast to play opposite Nealon in the role of the mother.

They Came From Upstairs is scheduled to be released January 16th, 2009.