The Made in Chelsea star, 32, and the TV presenter, 28, split four months ago after five years of dating, with Zara then falling for One Direction heartthrob Louis, 33.
The Love Island stunner, 27, was snapped back on British soil just days after she was pictured having a public smooch with the One Direction star in sunny Los Angeles.
The One Direction singer, 33, and Love Island star, 28, finally went public with their new relationship on Tuesday having been spotted on a lunch date.
The singer, 33, took to Instagram on Wednesday to share a gallery of pictures from their fun-filled antics at the popular music festival in Indio, California.
Body language expert Judi James has revealed not all is as it seems when it comes to the new couple, telling MailOnline that currently the pair are not equally as smitten.
Sam Thompson broke his social media silence on Wednesday, hours after his ex Zara McDermott was seen holding hands with new boyfriend Louis Tomlinson in Malibu.
Sam Thompson broke his social media silence on Wednesday, hours after his ex Zara McDermott was seen holding hands with new boyfriend Louis Tomlinson in Malibu.