The hot couple was spotted kissing and making out during a romantic trip to the beach in Malibu, California on Monday (21Mar16).

Photos of the loved-up 30-somethings splashed onto the Internet on Tuesday (22Mar16), and there now really is no doubt that the serial star daters now only have eyes for one another.

Katy was first linked to the Pirates of the Caribbean star in January (16), when they appeared to be more than just good friends at a Golden Globes after party. The couple was then spotted on a series of dates, and they jetted off to Hawaii on vacation late last month (Feb16).

But, just in case there were any doubts, Hollywood's latest 'it' couple sealed it with a kiss at the beach.

The pop star and the movie stud were also spotted really enjoying each other's company at the San Ysidro Ranch in Katy's native Santa Barbara, California on Sunday (20Mar16).

Their public displays of affection come weeks after Orlando reportedly took his new girlfriend back to Britain earlier this month (Mar16) to introduce the singer to his family and friends.

Both stars have a failed marriage behind them - Katy was married to British funnyman Russell Brand from 2010 to 2012, while Orlando's union with Australian supermodel Miranda Kerr ended in 2013. Since splitting from Brand, Katy has enjoyed an on/off romance with singer and songwriter John Mayer. She has also been linked to dance star Diplo and Florence + the MAChine rocker Robert Ackroyd.