The star donned a backless little black dress along with leg lengthening nude heels and gold jewellery as she hit the red carpet.
Oh, and in case you're wondering if you blinked and missed a few years of Suri Cruise growing up, fear not - the girl in the cute pink dress is Katie's co-star Bailee Madison.
Those are some formidable heels Bailee is wearing though - we wouldn't have been able to totter far in them when we were just 11!
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