Kate Upton, The 2012 Sports Illustrated Swimsuit Issue Kate Upton, The 2012 Sports Illustrated Swimsuit Issue

The former Rookie of the Year has turned pro.

Kate Upton is the cover girl for Sports Illustrated's 2012 Swimsuit Edition. Sports Illustrated was set to unveil the cover Monday night at an event, but a few issues were reportedly sent out early to a gas station in Michigan and quickly hit the Internet.

TMZ.com posted the cover early online.

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Upton, a model and actress, was named the Rookie of the Year in the 2011 Swimsuit Edition.

An email to Sports Illustrated was not immediately returned.