Jim Carrey in a revealing black one-piece bikini

Jenny McCarthy sizzled on the Fourth of July as she walked hand in hand with partner Jim Carrey in a revealing black one-piece bikini.

The happy couple couldn't stop laughing and smiling with each other as they took a romantic stroll down a Malibu beach.

Their antics took an even more hilarious turn as the pair teased photographers with a playful costume swap.
Serious: has Jim realised he is wearing his girlfriend's suit - or (below) how revealing it is?

Relaxing: Jenny and Jim share a laugh

McCarthy, former Playboy Playmate of the Year, looked glamorous in her black costume and shades, whilst Jim relaxed in more low-key shorts.

But after taking in the sun, the pair returned to their beach house - and came back out apparently unaware that madcap Jim had donned Jenny's bathing suit.

Very nice: Borat in his infamous 'mankini'

The couple then walked back along the beach to their house, where they relaxed close together on a sun lounger.

Comedian Carrey, 46, and model McCarthy, 35, have been dating for more than two years, and got serious in Autumn last year - when McCarthy revealed to Touch magazine that the pair had started hunting for a house.
Jim and Jenny, who have both been married before, deny engagement rumours, with McCarthy telling The Ellen DeGeneres Show that they 'don't need a piece of paper'.

McCarthy has a son Evan, six, who suffers from autism, by director John Asher, whilst Carrey has a daughter, Jane, 19, by his former wife, the actress Melissa Womer.

Time out: resting after the exertions of the day