Unfrosted spoilers follow.
Mad Men stars Jon Hamm and John Slattery have reprised their roles of Don Draper and Roger Sterling for a surprise cameo in Unfrosted.
The newly-released Netflix movie from Jerry Seinfeld is set in the 1960s and follows a battle between cereal companies Kellogg's and Post to create the next big breakfast product.
One scene features Hamm and Slattery in character as their Mad Men alter egos as they pitch a way to sell Pop-Tarts to Bob Cabana (Seinfeld) and his team, including Melissa McCarthy's Donna Stankowski.
Related: Unfrosted true story: Is any of Netflix's Pop-Tarts movie real?
Their idea doesn’t go down too well, however, as they suggest marketing it in a very kid-unfriendly way.
"The choice is yours – Raisin Bran and irrelevant, or provocative and revolutionary," Draper declares at one point, while Cabana turns quietly to Edsel Kellogg III (Jim Gaffigan) and asks: "Why are they so mean? It's just advertising."
Draper then intimidates Cabana as he quotes his famous Mad Men line: "You will never swim the English Channel and then drown in champagne," before Stankowski and Draper flirt on his way out.
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While the two stars are clearly playing their Mad Men characters, which fits the time period given the show is also set in the 1960s, Hamm and Slattery are officially credited in Unfrosted as Ad Man #1 and Ad Man #2.
The movie also stars Hugh Grant as Tony the Tiger, as well as Amy Schumer, Max Greenfield, James Marsden, Dan Levy, Fred Armisen and Jack McBrayer.
Speaking previously about casting Grant, Seinfeld told Empire: "That was the greatest part of the whole thing, honestly. Because I am a crazy fan of his. [Grant] asked me if it matters that Tony the Tiger has a British accent. I told him: 'No, who cares?'"
Unfrosted is available to watch now on Netflix.
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Sam is a freelance reporter and sub-editor who has a particular interest in movies, TV and music. After completing a journalism Masters at City University, London, Sam joined Digital Spy as a reporter, and has also freelanced for publications such as NME and Screen International. Sam, who also has a degree in Film, can wax lyrical about everything from Lord of the Rings to Love Is Blind, and is equally in his element crossing every 't' and dotting every 'i' as a sub-editor.
