NCIS star Michael Weatherly stopped by the ET set to dish on what it was like seeing a younger version of himself on tonight's NCIS, while also poking fun at himself in ET's throwback footage of the actor.

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Newcomer Tanner Stine, 19, takes on the role of a young Anthony DiNozzo in an all-new episode of NCIS, and Weatherly told us that's just fine with him.

"What's nice about it is that he makes me look much tougher, smarter and better looking," Weatherly said on the ET stage.

Weatherly continued with his trademark self-deprecating wit when ET's Brooke Anderson showed him a picture of himself from 1983 when he was still in high school.

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"I think that's Hillary Clinton at Yale. I don't know who that is," Weatherly joked. "That's not a guy who had an easy time."

ET interviewed Weatherly in 1994 when he was working on the soap opera Loving. In the '90s Weatherly helped pay the bills by playing guitar on the subway and the actor described why the gig was so appealing.

"You can set your own hours; you can walk in and walk out whenever you want," Weatherly said in 1994. "You only have to have a five-minute attention span because the trains come every three to five minutes."

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Weatherly told Brooke that he would make about $200-$300 per day. Watch the video to hear Weatherly put his guitar skills on display.

NCIS airs Tuesdays at 8 p.m. ET/PT on CBS.