Cameron Diaz stuffed a whole burger in her mouth to impress Keanu Reeves while on a date.

The "My Sister's Keeper" actress – who has recently been seen enjoying evenings with actors Jude Law, Leonardo DiCaprio and Jason Lewis – bemused onlookers at Los Angeles' Whisper Lounge restaurant with her unique flirting technique, showing the "Speed" star how much food she could cram into her jaws.

A source said: "They looked very cozy. Cameron was stuffing her burger in her mouth and playing up to the fact she has a wide mouth."

"Keanu was laughing – it was strange to see him giggling like that as he's regarded as a bit serious."

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The pair – who played lovers in 1996 movie "Feeling Minnesota" – enjoyed cocktails at the eatery before walking arm-in-arm to a nearby cinema.

Earlier this week, it was claimed 36-year-old Cameron "couldn't stop touching" "Sex and the City" actor Jason when they ate together at a sushi restaurant in Venice Beach.

An onlooker said: "Cameron and Jason were sitting in the corner of Shima totally wrapped up in one another. They couldn't stop touching each other. And we couldn't stop looking."

Source: BANG Showbiz