The former TOWIE star was spotted heading for dinner at the home of philanthropist John Caudwell yesterday and went all out for the occasion in a floor-length gold gown, which hugged her curves and exposed her back.
She styled her trademark red hair in a low ponytail that featured a French braid on one side.
Amy, 23, completed her look with a nude coloured clutch bag, peep toe heels and an understated gold watch.
John's dinner fell on the eve of this year's Global Gift Gala, a fundraising event which has been organised by himself and Eva.
So, of course, the ex-Desperate Housewives star was a VIP guest at John's house last night.
She kept her outfit simpler than Amy, however, opting for a smart black ensemble, layered with a black coat to keep warm in the chilly London weather.
Eva, 38, also wore a pair of spiked Louboutin heels and accessorised with a black clutch, while sweeping her brunette tresses into a stylish and chic up 'do.
After the evening was over, Amy was quick to tell her fans that she'd spent some time with the well-known US actress, as she tweeted: "Amazing night tonight thank you @cla1re24 and @johndcaudwell , so great to meet @EvaLongoria aswell xxx"
Eva will appear at the Global Gift Gala in London tonight (19 November) and is thought to be wearing a dress designed by her close pal Victoria Beckham, after Victoria tweeted a snap of herself making an adjustment to a long black gown that the petite Hollywood star had tried on.
What do you think of Amy's gold gown? Let us know below, as the best comment each week wins £50!
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