A rep for the Thor star confirms to E! News that the couple is expecting twins.
HOLA! magazine first reported the happy news, revealing that the 37-year-old Spanish actress is in her third trimester and the babies are due in the spring.
The handsome pair was most recently spotted at the 71st Annual Golden Globes as they posed for photographers on the red carpet.
The smiling blond beauty dressed her growing bump in a black floor-length Paule Ka frock, while the Aussie actor sported a Dolce & Gabbana tux for the star-studded awards show. The 30-year-old star also sweetly cradled his wife's belly.
Hemsworth's rep confirmed in November to E! News that the Fast & Furious 6 actress is pregnant for the second time. They are already parents to 1-year-old daughter India Rose, who will turn 2 before her siblings arrive.
Hemsworth and Pataky started dating in early 2010 and married that December.
"I think [parenthood] brings out the child in all of us," Hemsworth recently told Parade magazine. "That's what's so beautiful. It reminds you of the fascination you had with things and how you can spend hours just being with someone. It's amazing."
Hemsworth also told E! News in June that fatherhood has changed him "for the better."
"It puts things into perspective," he said.
Congrats to the growing family!
—Additional reporting by Marc Malkin and Maureen Heaton