Dennis Quaid's four-month-old twins, Thomas Boone and Zoe Grace, are back to full health and are "doing great," following a drug overdose that left them battling for life.

The 'Day After Tomorrow' actor and his wife, Kimberly welcomed their twins into the world via a surrogate mother on November 8 at the Cedars-Sinai Medical Center in Los Angeles.

Hospital staff accidentally gave Thomas and Zoe 1000 times the recommended dosage of the anti-coagulant drug Heparin. The Quaids subsequently sued the hospital.

Thankfully, the twins have made a full recovery. "We just lie around in bed with them and make funny faces and funny sounds and see how they react. They're starting to giggle, too," Quaid says. 

The actor also has a 15-year-old son, Jack Henry, from his marriage to Meg Ryan.

[FF]