Richard Gere, Julia Roberts

Remember Tom Cruise dancing in his underwear in Risky Business? Julia Roberts playing a hooker with a heart of gold in Pretty Woman? Robert Pattinson brooding and glowing in Twilight? Every now and then, one memorable role comes along that allows an unknown celebrity to skyrocket to the A list. But what are the biggest star-making roles of all time?

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Tune in to TVGN Monday at 9/8c as the network counts down the 25 biggest star-making roles. Check out a clip of the countdown below, and let us know in the comments which roles you think should be included!