Unfortunately her idea for a low-key evening didn't quite go to plan, as she's been tailed by a group of photographers ever since she landed in London yesterday.
The Friends star went to La Famiglia Italian restaurant in Chelsea and shared a meal with a couple of pals.
Dining in London: Jennifer Aniston visits Italian restaurant La Famiglia in the capital. The actress is in the UK ahead of boyfriend John Mayer's tourShe is in the UK to be by the side of her boyfriend John Mayer as he prepares to tour the UK.
Jennifer, 39, is due to meet him when he flies into Britain from Denmark today ahead of his show in Birmingham tomorrow night. They will both end up in London at the weekend when he plays Hyde Park Calling on the same bill as Eric Clapton and Sheryl Crow, who also happens to be a close friend of Jennifer's.
Jennifer shuns the usual celebrity haunts last night in London's Chelsea area
Despite their relationship only being public knowledge for a month, they have been dating for three months but kept it secret until things got more serious.
At the beginning of the month, he was introduced to Jen's best pal Courtney Cox and husband David Arquette.
Mayer, 30, has dated a string of beauties - including Jennifer Love Hewitt and Jessica Simpson - while Aniston, who was married to Brad Pitt for four and a half years, has been single since splitting from Vince Vaughn in December 2006.
We're hoping that Jen's found true love this time - but, then, musicians can be notoriously fickle when it comes to groupies.
No1 fan: Jennifer Aniston arrives at London Heathrow this afternoon, having flown in from Los Angeles to meet John Mayer