Ava is currently in London on the promo trail for her mum's new movie, A Wrinkle In Time, but she took a break from the red carpet to try the world's most Instagrammable restaurant, Sketch, with what we can only guess is her new beau. The Daily Mail (who else?) have photo proof, but here is a photo of the Beatle's grandson, and Ava, and Sketch, so you can form your own mental picture:
Both Ava and Arthur are 18, both have famous parents and... that's about all we know about them (although we can tell you a lot about Ava's hair).
Ava made her Paris debut in March this year, at the prestigious le Bal des Débutantes debutante ball, where she wore a stunning Giambattista Valli haute couture gown. In other words, we may not know what Reese Witherspoon thinks of the Ava/Arthur situation (yet), but she must be happy for her to date.