Proudlock was suited and booted at the event on Wednesday (8 July) and model Emma looked simply stunning in a lace crop top and black full skirt.
The music and arts festival is held every July on the Berkshire bank of the River Thames, and this year welcomes performances from Lionel Ritchie and Jessie J.
Last weekend, Proudlock and Emma were partying at the New Look Wireless Festival with TOWIE's Vas J Morgan and radio DJ Sarah Jane, and it looked like they weren't fussed about missing out on all the action in Los Angeles.
Currently, a handful of the Chelsea cast including Lucy Watson, Jamie Laing, Alex Mytton and Binky Felstead are in LA to film a brand new spin-off show, just like their New York special last summer.
Proudlock hasn't addressed his absence in LA, but some of his co-stars have clarified whether they are taking part in the standalone series.
Co-star and close friend Stevie Johnson won't be heading down to Beverly Hills as he is choosing to put his relationship with girlfriend Cressida Stewart before the show.
Elsewehere, Stevie's best mate Andy Jordan confirmed this week that he has quit the show to focus on his lifestyle brand and music career.
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