Nicktoonsters was a short-lived British and Irish television channel which launched on 18 August 2008.

[2] The channel launched on Sky Digital on 18 August 2008 with a Rugrats marathon week before it commenced its regular schedule.

[4][5] Comedy Central Extra +1 eventually reclaimed the full 24 hours of channel space in October 2012 when Nicktoons Replay was discontinued and replaced by Nick Jr. +1.

Nicktoonsters' programming consisted of older library content from Nicktoons, including Rugrats, Hey Arnold!, The Wild Thornberrys, CatDog, and As Told by Ginger.

[1] In the later months of the channel's existence, newer programmes such as The Fairly OddParents and SpongeBob SquarePants aired on holidays and weekends.