David Giesbrecht/Fox

Hollywood scion JASON RITTER shows off the funny side he inherited.

Talk about pressure. As the son of legendary comedian John ­Ritter and actress Nancy Morgan, Jason Ritter is used to eyes being on him. But starring in his own TV comedy, Us & Them, due to premiere later this year on Fox, takes it to a whole new level. Luckily, Alexis Bledel, his love interest on the show about a city guy who falls for a country girl, gets it too. “She’s lovely and sweet and fun,” Ritter says. “And we got to unfold things slowly, because behind every shy person is a wild and crazy person!”

Ritter should know. The Hollywood youngster has kept an admirably low profile — in part because he was the bashful type himself. In fact, growing up in Hollywood, Ritter didn’t have acting ambitions at all. “As a teenager, I really couldn’t think of anything I’d want to do less,” he says. “I was so shy. The idea of anyone looking at me at all was mortifying.”

But as high school ended, he found himself smitten with the stage during a high school fundraiser. “I realized I had to stop caring about what other people thought of me,” Ritter says. “I let go of the idea of ever being cool because you had to be aloof and not show passion about anything. I decided to just do what I want.”

Still, expectations can be heavy. “There was a certain period of time when a bad audition would feel particularly embarrassing because when I first walked in the room, the casting director talked about how funny my dad was,” Ritter says. “And there I was, blowing it. It felt like it was a whole different kind of humiliation.” These days, though, he’s his own man. “Some people can hold court and make people laugh,” Ritter says. “My humor comes out like a little hermit crab. You have to poke at it a bit.”

Which is not to say he hasn’t had some “rollicking moments” on the Us & Them set — like when he found himself chasing a chicken, “trying to save it from its fate. There were feathers everywhere. And then there are ­quieter, sweet moments, which I like as well.”

That, of course, begs the question: Will Ritter return to his TV alma mater, the NBC drama Parenthood, soon? “It’s a possibility, but I have no idea when or how,” he says. “I would love to, but it all depends on how things come together.”

In the meantime, he’s relishing working with some of his own comedy idols, like Michael Ian Black and Kerri Kenney, on Us & Them. “I grew up watching The State,” Ritter says. “So the fanboy in me is screaming out while having to play it cool. It’s hard to keep a straight face on set.”