The "American Idol" host is on the lingerie company's 2008 What Is Sexy? list — along with Eva Mendes and Josh Holloway.
"What's sexy about (Seacrest) is he doesn't act like he is," Victoria's Secret spokeswoman Monica Mitro told The Associated Press in a phone interview. "We felt that his smile was quite sexy — in a very subtle and innocent and humble way."
The team of executives and designers who compiled the list looked for attributes such as "passion and humor and style and charisma," Mitro said.
Mendes is the sexiest actress; Holloway, who plays Sawyer on ABC's "Lost," is the sexiest beach body; Victoria "Posh Spice" Beckham, who has three sons with husband David Beckham, is the sexiest mom; and Katherine Heigl and her husband, musician Josh Kelley are the sexiest newlyweds.
Other sexy celebs: Eric Bana (actor), Chris Brown (male musician), Dane Cook (funnyman), Dallas Cowboys quarterback Tony Romo (male athlete),Rihanna (female musician), Justin Chambers (dad), "Gossip Girl" Blake Lively (newcomer), and Fergie and Josh Duhamel (couple).
Scarlett Johansson was honored for her sexy style, Jessica Biel for her lips, Kate Bosworth for her eyes and Ali Larter for her legs.
ABC's "Dirty Sexy Money," which co-stars Peter Krause and William Baldwin, has the sexiest cast, according to the list.
Victoria's Secret supermodel-spokeswomen, including Selita Ebanks, Adriana Lima and Karolina Kurkova, were to host a party in Scottsdale, Ariz., on Saturday — the eve of the Super Bowl — to honor the list-makers.
Lima hosts a one-hour special "Victoria's Secret: What Is Sexy? 2008," which is scheduled to air Feb. 9 on E! Entertainment Television. It was produced by E! and Ryan Seacrest Productions. Seacrest is host of the channel's "E! News"entertainment news program.
Mitro said Victoria's Secret put the list together before E! committed to producing the special.
"Ryan came to our fashion show in November and he had the best smile on our red carpet," Mitro said. "He was an easy choice for us