The 24-year-old singer, plus older sister, Charlie, was there to support Oliver, 27, who was just announced as the face of Autograph menswear.
Later on, the three were seen heading out to celebrate more at Groucho Club.
“So happy to announce I’m the new face of @marksandspencer Autograph and share with you one of the new campaign images. Big thank you to everyone that made this happen,” Oliver shared on Instagram.
Earlier in the week, Pixie joined singer Ella Eyre at the New Remastered Fiat 500 Launch event held at Potters Field Park.
10+ pics inside of Pixie Lott, Oliver Cheshire and Ella Eyre…