Amber Heard and Johnny Depp

Amber Heard and Johnny Depp

Amber Heard is reportedly tired of Johnny Depp's "erratic behaviour."

The 28-year-old actress, who confirmed their engagement in January after less than two years of dating, is allegedly thinking about calling off their upcoming wedding.

A source said: "She's realising she might be happier with someone else."

The 51-year-old 'Lone Ranger' actor, who has daughter Lily-Rose, 15, and son Jack, 12, with ex-girlfriend Vanessa Paradis, is said to have "awful mood swings" and "annoys Amber."

But the 'Pineapple Express' beauty is still moving forward with their wedding plans for the moment.

The insider told Us Weekly magazine: "It'll be a small ceremony on Amber Beach, part of his island in the Bahamas, that's named after her.

"They'll only invite close friends and family."

It was previously claimed Amber was in no rush to marry Johnny after his strange presentation at an awards ceremony in Los Angeles last month, where he appeared to be drunk.

Another source said: "There's not rush to marry at the moment. Johnny is crazy in love with Amber, but there is turmoil in the relationship.

"She is not really ready to settle down. Amber flirts and has many different kinds of relationships."