Billy, Goat, and Gruff are three porcelain sheep joined together and sometimes mistakenly believed to be a single sheep with three heads who are minor characters in the Toy Story series. They are always wondering off and enjoy causing mischief and when they do, they can only be stopped by their shepherdess, Bo Peep.
In the first film when Andy has set a stage portraying Mr. Potato Head as One-Eyed Bart, he threatens to have the sheep run over if Bo Peep doesn't keep quiet as he 'robs' the bank. Later when Woody gathers the toys for a staff meeting, Bo Peep pulls Woody over and thanks him for saving her sheep then asks if he'd like her to get someone else to watch them that night, (meaning she wants the two of them to go on a date.) Later in the film, Bo is stroking their heads when Hamm tells the toys that he sees Woody next door. In the end, the sheep are seen above Woody and Bo Peep with a branch of mistletoe.
The sheep are first seen returning with Bo from searching Molly's room for Woody's hat. Bo goes to calm Woody down and is about to kiss him but is interrupted by her sheep who are playing tug-of-war on a video game controller with Rex, prompting her to whistle to attract their attention.
Like Bo Peep and the other toys in Andy's room, the sheep were given away. Unlike their shepherdess, however, they didn't appear in any home footage at the beginning of the film. Their disappearance (along with their owner) will be explained in Toy Story 4.
In Toy Story 4, the sheep will return with Bo Peep and have a larger role. As shown in a sneak peek, their names are revealed (from left to right) as Billy, Goat, and Gruff, a reference to the Norwegian fairy tale. Woody is surprised to learn their names, expressing how Bo Peep never told him, but she counters that Woody never asked.
Along with Bo Peep they left Andy and his toys to live the life of adventure. They are now covered in stickers.
- Their names are a reference to The Three Billy Goats Gruff.
- In the 4th movie they have gone through a design change and have shorter noses and appear slicker.