The Desperate Housewives star arrived in the capital over the weekend accompanied by an entourage including her mum and sister and trusty hairdresser Ken Paves (who also jetsets with Victoria Beckham).
Gorgeous Eva shared a few photos from her trip via Twitter, including an obligatory snap of herself and Ken "goofing around" beside an iconic red telephone box.
Eva wrapped up warm, telling fans: "It's freezing!"
The brunette beauty is in London ahead of the Global Gift Gala, a fundraising event that aims to make a difference in the lives of countless children and women worldwide.
This year's Global Gift Gala featuring a dinner and auction takes place on Tuesday, 19 November and will be co-hosted by Pixie Lott's model boyfriend Oliver Cheshire.
It will benefit the Eva Longoria Foundation and Caudwell Children, with Eva and John Caudwell being the organisers of the evening. Individual tickets for the charity event cost a whopping £1,000 with a VIP Table being offered for £15,000.
As well as being a successful actress, Eva is an active philanthropist. She founded her Eva Longoria Foundation in 2012 to help Latinas build better futures for themselves and their families through education and entrepreneurship.
She's also the founder of Eva's Heroes, a non profit organisation that works with disabled children.
Eva's overseas trip comes amid rumours in the US that she's in a new relationship with Jose 'Pepe' Antonio Baston, the president of Latin American TV company Televisa.
According to People, they made their debut as a couple in Mexico City last week, attending the Museo Jumex Opening dinner at Case De La Bola.
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