Matthew McConaughey is celebrating his youngest son’s birthday. In a new Instagram post, McConaughey shared a rare look at Livingston, who’s celebrating his 11th birthday. Matthew McConaughey and Camila Alves go pantless for the launch of their tequila brandAll about Matthew McConaughey and Camila Alves’ 3 kids: Levi, Vida and LivingstonA post shared by Matthew McConaughey (@officiallymcconaughey)The photo shows McConaughey and Livingston on the couch, with the boy laughing and McConaughey looking at him with his reading glasses on.