The cast of Matthew Vaughn's upcoming superhero film keeps getting bigger and younger, with the new addition of Morgan Lily as a tyke version of Mystique in X-Men: First Class, according to

We reported back in July that Winter's Bone star Jennifer Lawrence would play Mystique. This new story indicates that the 10-year-old Lily, who has recently appeared in Flipped and 2012, will also play an even younger version of the character.

RELATED: Wolverine's Arrival Teased in Bosslogic's Deadpool 3 Fan Poster

It was noted yesterday that X-Men: First Class screenwriter Jane Goldman revealed that X-Men: First Class will start shooting in three weeks. Matthew Vaughn will be directing from a script by Goldman and Zack Stentz.

The cast seems to be coming together very quickly on X-Men: First Class. We'll be sure to keep you posted with any further updates as soon as more information comes in.