With the holidays right around the corner, the Oscar winner stopped to talk with ET's Carly Steel and opened up about his family's holiday plans after recovering from a very hectic Thanksgiving.
"We're still catching our breath after that one," the actor joked. "We had 31 McConaugheys at the house, and the house sleeps twelve. So we had air mattresses and nine kids in one queen-sized bed and it was basically, 'Sleep where you can find a pillow.'"
However, that doesn't mean their December is going to be any less busy. McConaughey says the family is planning to fly to New York for a while before heading down to Brazil to visit Alves' family for the holidays.
In Sing, McConaughey plays Buster Moon, a hopeful koala who holds a singing competition to raise the money needed to keep his theater from closing.
In real life, McConaughey might not be a professional singer himself, but he says he likes to belt out a little karaoke from time to time. Specifically, John Mellencamp's 1983 single "Pink Houses." However, the star was a little gun-shy when it came to giving a live performance on the red carpet.
"Not right here," McConaughey said, laughing. "I don’t have my sound system man balancing my voice."
The star also opened up on his involvement in a rideshare program at the University of Texas Austin last month, where he gave rides to students at his alma mater in an effort to raise awareness for the campus' important service.
"We surprised the heck out of so many people," he recounted. "We pulled up, 'Do you need a ride?' [They said,] 'Yeah, we need a ride… what?! What are you doing driving…?' [I was] like, ‘Yep, you never know who’s going to be driving!'"
According to McConaughey, the program serves to help students stay safe when heading to their cars, dorms or the library to study late at night.
"It’s just a great thing to have on campus for all Longhorns to look after each other," McConaughey shared. For more on the A-lister's involvement promoting the campus' program, check out the video below.