This Is Us stars Mandy Moore, Susan Kelechi Watson and Justin Hartley can't help but gush about their real life friendships on the Emmys red carpet

The This Is Us castmembers like each other so much it’s “disgusting,” jokes star Justin Hartley.

Hartley and his onscreen mom – Mandy Moore – and sister-in-law – Susan Kelechi Watson – cozied up on the Emmy’s red carpet, with the actor gushing to PEOPLE TV, “These are like some of my best friends.”

Adds Moore, “True story, yes, we all really love each other.”

Of adjusting to This Is Us‘ catapulting fame after premiering last fall, Watson says that the cast is “kind of like, so low-key.”

“We are so grateful that people have come along for the ride with us because we feel so incredibly proud and excited by it,” she adds.

Echoes Moore, “Ithink that’s what’s so great about our show, is none of us are perfect people… [It’s] really representational of all of us out there in life.”

Credit: Vince Bucci/Invision for the Television Academy/AP; Rob Latour/Variety/Shutterstock (2)

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Dozens of A-listers have descended on Hollywood for TV’s biggest night, the 2017 Emmy Awards. Some of the biggest shows will be battling it out for the night’s top awards, including The Crown, Better Call Saul, The Handmaid’s Tale, House of Cards, Stranger Things, This Is Us and Westworld for outstanding drama series and Atlanta, black-ish, Master of None, Modern Family, Silicon Valley, Unbreakable Kimmy Schmidt and Veep for outstanding comedy series.

Watch the full episode of PEOPLE & Entertainment Weekly Red Carpet Live, streaming now on PeopleTV. Go to, or download the app on your favorite streaming device.

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Other big awards to watch include outstanding limited series (which pits Big Little Lies, The Night Of, Feud: Bette and Joan, Genius and Fargo against one another) and the major acting categories like outstanding lead actress in a limited series or TV movie and lead actor in a drama series.

The 69th Primetime Emmy Awards, hosted by Stephen Colbert, are airing live on CBS from the Microsoft Theater in Los Angeles at 8 p.m. ET.