Jensen Ackles says he's "lost" when it comes to fatherhood. Credit: Chelsea Lauren/

Jensen Ackles' world turned upside down when his wife Danneel Harris welcomed daughter Justice Jay on May 30. "It's been quite the adjustment," the Supernatural star, 35, tells E! News of being a first-time father.

"A friend of mine says it's a slightly different gear, and I said, 'Different gear? No, you put it in park, you get out of the car, you get in a different car, you take a left down a wrong street,'" he adds. "That's basically where I'm at now."

Getting back into the groove at work has been an adjustment for Ackles, who recently began production on Season 9 of his CW series. "I'm just completely lost," he says. Nevertheless, he says that "the baby's doing great."

Ackles isn't the only Supernatural star with a baby on the brain: his costar, Jared Padelecki, is expecting his second child with wife Genevieve Cortese; Us Weekly exclusively shared the actors' happy news on Sunday, July 21. Padelecki, 31, later tweeted a picture of his son Thomas Colton, 16 months, holding his mother's sonogram.

Supernatural's ninth season premieres Tuesday, Oct. 15, on The CW.