Scarlett Johansson gave Ryan Reynolds her wisdom tooth for his birthday

Actress Scarlett Johansson reportedly gave boyfriend Ryan Reynolds her wisdom tooth for his birthday.

It was Reynolds' 31st birthday on Tuesday, but Scarlett held an early celebration for him at Los Angeles' Chateau Marmont hotel last week - where she presented him with her tooth, which had been dipped in gold and made into a necklace.

A source told E!: "She'd just had her wisdom teeth removed, so she had one dipped in gold and strung on a necklace for him."

Johansson, who recently flew to Canada with Ryan to meet his parents -which fueled rumors of an engagement - also organized another special treat for his birthday.

Johansson reportedly paid for Ryan to have a full body massage with all of David Beckham's bodyguards present.

The soccer ace is said to have his muscles kneaded to perfection while his security team watches to ensure no body part is missed.

Scarlett's representative said: "Scarlett was out of town for Ryan's birthday but she gave him a gift this weekend in private. There was no one else there."