Alex Pettyfer And Riley Keough Engaged, Keough Spotted With Engagement Ring [PHOTOS]

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Alex Pettyfer shows off his abs.
Some are wondering if Alex Pettfyer is aiming to make an honest woman out of girlfriend Riley Keough after she was spotted wearing a sparkler on her ring finger.

The lovebirds dined at Le Petit Four on Sunset Boulevard in West Hollywood yesterday, and Pettyfer leaned down to give Keough a smooch.

Pettyfer previously dated Emma Roberts.