Miley Cyrus. Will Smith. Tom Cruise. Michael Phelps. Sarah Palin. These Hollywood superstars and political and sports figures are just four of the personalities profiled in "Barbara Walters Presents: The 10 Most Fascinating People of 2008" -- and ET will have exclusive clips from the special on Thursday night's show! See who else made the list...

"All of our subjects have reached extraordinary milestones in their personal lives or careers this year," says Barbara of the 16th edition of her annual roundup.

In her hour-long ABC special, airing Thursday at 10pm ET, "30 Rock" star Tina Fey, political commentator Rush Limbaugh, veteran 'Frost/Nixon' star Frank Langella and Thomas Beatie (the transgendered man who gave birth to a baby girl this past summer) are also profiled.

Who is the No. 1 Most Fascinating Person of 2008? The answer will be revealed Thursday on "Barbara Walters Presents: The 10 Most Fascinating People of 2008." And catch ET Thursday night for exclusive clips from the special!