StarWars.com:

"Cameras are rolling on the adventure-filled past of the iconic scoundrel and everyone’s favorite Wookiee; principal photography on the untitled Han Solo Star Wars Story officially began February 20 at Pinewood Studios, London.

The movie will explore the duo’s adventures before the events of Star Wars: A New Hope, including their early encounters with that other card-playing rogue from a galaxy far, far away, Lando Calrissian".

For the full scoop head on over to StarWars.com.