Sadie Robertson admits she and Brett Eldredge hit off immediately when they first met, but while she thinks he's "the best," she insists that they are not dating despite intense speculation from fans and media.

The Duck Dynasty star appears as the leading lady in Eldredge's sweetly romantic video for "The Long Way," and she tells Entertainment Tonight that they clicked from the first and had a great time laughing all day on the shoot.

"Brett's amazing," she gushes. "We had the most fun that day. We just goofed off ... he's a goober, he's hilarious," she says with obvious fondness. "That started a friendship that will hopefully last a long time."

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Fans started speculating that the pair were dating when they saw their natural chemistry in the video, and Robertson admits they're not the only ones.

"Everybody thinks we're dating," she says. "We just had so much fun together. Everybody was like, 'No, you were really laughing.' We really were. We really did have a great time. But I don't know, girl," she says with a laugh, waving her hand. "It's too complicated."

Eldredge tells Taste of Country that he first friended Robertson on social media, and then cast her in his video for "The Long Way."

"Literally, I just love everything she stands for, and I thought she would be amazing for this video if somehow we could get her to do this and she was like all about it," he says. "I just thought she's the kind of person that you're looking for in this kind of song, just a good heart, a great person, beautiful soul."

He, too, is careful to clarify that they are not dating.

"She did an amazing job and somehow people thought we were dating for a while. It's like, 'No, we're just good, new friends,'" he says. "We just met that day and we hit it off as friends."

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