Meghan Markle is "overwhelmed" by the attention on her relationship to Prince Harry.

The 36-year-old beauty's former 'Suits' co-star Max Topplin has revealed just how much pressure the actress is under as she gets to grips with being girlfriend to a member of the royal family.

However, the 27-year-old actor - who played Harold Gunderson in the USA Network legal drama - says Meghan is madly in love with the 32-year-old hunk and that's all that matters.

He told New Idea magazine: "She's an actress, this isn't what she signed up for anyway ... this is like a whole new ballpark.

"But I know she's really happy, I know she's just embracing this new world for herself and I know she loves the guy."

Meghan and Harry celebrated the brunette beauty's 36th birthday last month with a three-week getaway to Africa, which included a £1,200-a-night stay at the luxurious Tongabezi Lodge in Zambia along the Zambesi river.

Speculation contiunes to grow that the pair have got engaged or Harry is preparing to pop the question soon.

The couple have been in a relationship since last November and, although some insiders thought a proposal would come last month, former royal chef Darren McGrady recently said a Christmas proposal is much more likely.

Darren said in August: "I really do think they would have been engaged by now. But Princess Diana's 20th anniversary this month in August, they can't trump that. And then November is the Queen and Prince Philip's platinum wedding anniversary so they can't trump that either, whereas December they can announce the engagement and they'd be free to marry next year; I think that's what's going to happen."

The former cook - who served the late Princess Diana and her two sons Harry and William - added that if the flame-haired royal does propose in December, it would mean the couple would be able to join the royal family for their traditional Christmas celebrations.