Reese Witherspoon and Matthew McConaughey stole the show with their families at the premiere of the new animated hit Sing in Los Angeles.
Stunning Reese, 40, who lends her voice to a pig named Rosita, was all smiles with her look-alike daughter Ava, 17, sons Deacon, 13, and Tennessee, 4, and husband Jim Toth.
Matthew, 47, who…