9021 Oh

11/20/2007 1:52 PM PST BY TMZ STAFF

9021 Oh

The 42-year-old famous high schooler turned up at a Las Vegas event on Saturday, looking like the Prom King -- at the 25th reunion!

Since roaming the fictional halls of West Beverly High, Luke has starred on Broadway and in several canceled TV series, and divorced the mother of his two children.

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