Dylan Dreyer ’s son came to work with his mom and met a Hollywood icon.

“GREAT SCOTT!! What an awesome day to take Calvin to work!!” the TODAY meteorologist and 3rd Hour co-host captioned an Instagram post with photos of her eldest child meeting Christopher Lloyd, aka Emmett “Doc” Brown from the “Back to the Future” franchise.

Lloyd appeared on the 3rd Hour of TODAY on Aug. 8 to talk about his upcoming thriller, “Nobody 2.”

In the first two photos, Dylan and her son smile alongside Lloyd, and Calvin, 8, shakes his hand. In the last, Calvin poses next to his signature, among high-profile autographs, written on a wall at TODAY.

Calvin made an appearance at the start of the 3rd Hour of TODAY, with Dylan telling viewers, “We have some very special guests in Studio 1A — there's my son Ca

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