Well, that was fast! The last Elvis Presley's granddaughter Riley Keough has locked in her hunka-hunka burnin' love!

After about six months of dating, Lisa Marie Presley's model-actress daughter, 22, is engaged to Alex Pettyfer, a source confirms to Us Weekly.

After connecting as costars on the upcoming male stripper flick Magic Mike, Keough and the British actor, 21, were first photographed smooching last October. And on Monday, the twosome grabbed lunch at Le Petit Four in L.A. --with Keough sporting an engagement ring.

當(dāng)?shù)貢r間12日，亞歷克斯與女友萊莉·科奧現(xiàn)身洛杉磯，與友人一同用餐。面對狗仔隊的鏡頭，兩人毫不避嫌，不斷做出親密舉動，萊莉還有意地抬高雙手拿包，秀出左手無名指上的寶石戒指，似乎在高調(diào)宣布：這個男人是我的了！

幾乎是“拍一片，愛一女”的亞歷克斯與萊莉相識于新片《魔力麥克》片場，并迅速傳出戀情。萊莉可是來頭不小，她是貓王的外孫女，其母麗莎·瑪麗還曾與尼古拉斯·凱奇有過一段短暫的婚姻。從小就在名利場里摸爬滾打的萊莉是否能收服亞歷克斯呢？走著瞧吧。