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Rachel McAdams RMcAdams111708_07_X17.jpg

Say WHAT?

The luminous star of Mean Girls, The Notebook and Red Eye put on her Sunday best (er, well, she could've worn something a bit more flattering, but I'm just happy to finally see her!) to celebrate her 30th birthday at Beso last night... but she wasn't celebrating with Ryan Gosling!

An X17 inside source inside the Hollywood hot spot tells us that Rachel and Wilmer Valderrama "were sitting at the same table and hanging upstairs at Kiss Lounge." Any hanky panky goin' on? Nope - our source says they were "just hanging out platonically."

Our source goes on to say that "Rachel may want her ex Ryan to think something different, of course, as he was not in on the festivities... and DJing at Bardot instead. Clearly that relationship is O-V-E-R!"

If Ryan is still dating Rachel, he should be with her on her birthday!