"I told him to stay open minded and not to find the most attractive girl the first night and only have eyes for her," Sean, who starred on Season 17 of The Bachelor, shared withUs Weekly of his conversation with Arie.
"Then I told him after the show is the hardest part," Sean continued. "That's when you have to commit and make it work and block out all the bright lights that come your way. Hopefully he takes my advice."
But Sean, 33, apparently has complete confidence in Arie and his ability to provide good, quality entertainment for ABC viewers.
"Arie has got a great personality. He's kind of quirky," Sean told Us.
"He knows he's nerdy, which I think is endearing. He definitely doesn't play the cool guy part. He knows who he is and doesn't put on any fronts. He's just a nerdy race car driver."
Catherine, who welcomed a son with Sean in July 2016, is also a fan of Arie's unique charm and sense of humor.
"Sean was funny but you wouldn't expect that from him. Arie is the same way," Catherine explained.
"You would expect him to be this cool, sauce guy but he's not. It'll disarm a lot of the girls, which will be great. It's like, 'Oh, you're kind of weird. I'll be weird too. I'll be me.'"