AceShowbiz - Lena Dunham has reunited with her ex-boyfriend Jack Antonoff to spend time together as "best friends".

The Girls creator and star took to Instagram over the weekend, June 22-24 to post the sweet shot, in which she leans against Jack's shoulder as the fun. and Bleachers star grins.

"Best friends 4ever," the 32-year-old wrote alongside the image.

best friends 4ever

A post shared by Lena Dunham (@lenadunham) on Jun 22, 2018 at 10:03pm PDT

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Lena and Jack dated for five years before calling time on their relationship in January. However, the former couple has remained on amicable terms.

Earlier this month, the friendly exes exchanged some seemingly flirty messages on social media.

Noticing the early timestamp on a photo of Lena and one of her cats on Instagram, Jack questioned his ex-girlfriend's schedule, and asked: "Why are you awake?".

"Cuz (sic) it's the prime time to catch you on the gram, four eyes," Lena cheekily responded.