A Kate Middleton lookalike has gone from waiting tables – where patrons mistook her for the Duchess of Cambridge – to cashing in on her striking resemblance to the princess.

Heidi Agan, 32, signed with an agency where she’ll be paid nearly $1,000 an appearance as a professional Middleton lookalike. The Mirror and The Daily Mail both have side-by-side comparisons of Agan and the princess for you to judge the resemblance.

Agan quit her £6 an hour job at Frankie and Benny’s – the English equivalent of the Olive Garden – in February to earn more than 100 times her old pay as a Duchess of Cambridge lookalike.

Patrons of Frankie and Benny’s often thought Middleton was waitressing at the chain restaurant, Agan told The Mirror.

"People would come in and point at me and say 'that's her'," she told the tabloid. "I've had other people come up to me during jobs convinced I'm Kate.”

It’s not just customers who see the resemblance. Even Agan’s 3-year-old daughter has difficulty distinguishing Middleton from her mother.

"When my daughter sees her in a magazine she points and says 'there you are mummy,’” Agan told The Mirror. “She's turned into a right little royalist."

Agan sided with her royal doppleganger in the controversy over nude photographs published of the princess by French publication Closer. There's an injunction against the magazine preventing it from further publishing naked pictures of Middleton.

“If someone had done that to me I would go to the police,” Agan said. "She and William don't get any time out and they were just trying to be a normal couple. It's a terrible invasion of their privacy.”

Anyone looking to compare Middleton’s nude body to Agan’s should abandon the thought, the former waitress said.

"I haven't been asked to go topless on any of the jobs yet - and I certainly wouldn't do it because I'm a mum-of-two!" she told The Mirror.

Agan said she’s fortunate to find a job as a Middleton lookalike.

"It's a huge difference from working in a restaurant and it pays better,” she said. “It's a really fun job as I'm doing something different every day.”