LOS ANGELES, California (X17online) - Cameras were rolling and Rob and Kristen were on the set, as the first day of filming for Eclipse got underway yesterday in Vancouver. The director even sent out a Tweet to mark the occasion.

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"Shot with Rob and Kristen today, both gave great performances. Lots of frustrating noisy planes overhead but beautiful scene regardless," director David Slade posted on his Twitter account.

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'Eclipse' - the third installment of the Twilight series is expected in theaters in 2010.

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