Robert Pattinson Spotted At LA Hotel With 'Mystery Blonde'?

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For all those of you who are seething about Robert Pattinson and Kristen Stewart's rumoured reconciliation, following her VERY public affair with married man Rupert Sanders, it seems as if things may not be all they seem...

The rumour mills are busily turning out stories which suggest RPattz was spotted at the New York Dream Downtown Hotel with a "mystery blonde" - and, being as we KNOW KStew is sporting her usual brunette tresses, it can't possibly have been her.

However, while some are dubbing the blonde a total mystery, other sources are confidently reporting that it was none other than Sienna Miller, baby mama to Rob's BFF Tom Sturridge.

Perez Hilton has reported that Sienna, in the midst of promoting her new movie 'Girl' at the Hamptons Film Festival, joined RPattz (and we presume Tom) at the Monkey Bar, before re-locating to the Electric Room and the Dream Downtown Hotel!

The site has also suggested that the duo are firmly AGAINST Robert Pattinson getting back together with ex current  on-screen girlfriend Kristen Stewart - so maybe they were working hard at getting him to appreciate the single life.

Whoever the mystery girl was, we hope she cheered him up - poor Rob hasn't had the best year so far...

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