Marty McFly, in response to Mad Dog Tannen's question 'What's your name, dude?'
(Michael J. Fox, in 'Back to the Future Part III')
Hermione's alias, when asked her name
by Scabior (the Snatcher)
(Emma Watson, in 'Harry Potter and the Deathly Hallows, Part 1')
Ferris Bueller, appropriating a restaurant reservation
with his pals
(Matthew Broderick, in 'Ferris Bueller's Day Off')
Frodo, to Barliman Butterbur at The Prancing Pony Inn
(Elijah Wood, in 'The Lord of the Rings: The Fellowship of the Ring')
Ron Burgundy, in his prank phone call to Veronica, claiming she's been promoted and needs to move to Moscow
(Will Ferrell, in 'Anchorman: The Legend of Ron Burgundy')
Benjamin Braddock, signing the Taft Hotel registration card
(Dustin Hoffman, in 'The Graduate')
Austin Powers, at the casino table: 'Allow myself to introduce...myself. My name is…'
(Mike Myers, in 'Austin Powers: International Man of Mystery')
John and Jeremy use these four aliases
in a wedding montage
(Owen Wilson & Vince Vaughn, in 'The Wedding Crashers')
Harry's alias, when asked his name
by Scabior (the Snatcher)
(Daniel Radcliffe, in 'Harry Potter and the Deathly Hallows, Part 1')
Hans Gruber, pretending to be a Nakatomi Corporation employee, when confronted by John McClane
(Alan Rickman, in 'Die Hard')
Travis Bickle, making his name very clear to the 'incognito' Secret Service man, who offered to help him
'apply' to the agency
(Robert De Niro, in 'Taxi Driver')
The Cable Guy, at the end when Steven says 'You never told me your real name'
(Jim Carrey, in 'The Cable Guy')
These are four of the aliases used by Irwin 'Fletch' Fletcher
(Chevy Chase, in 'Fletch' and 'Fletch Lives')
Frank Abagnale Jr. adopts this alter ego of the comic book super hero 'The Flash' when identifying himself to the FBI
(Leonardo DiCaprio, in 'Catch Me If You Can')
Han Solo, in response to the intercom voice asking 'Who is this? What's your operating number?'
(Harrison Ford, in 'Star Wars: Episode IV - A New Hope')