Not all actors that look alike are in the 'separated at birth' category - a resemblance can be a very fleeting thing, and many of the comparisons here span decades…
Top 15 Celebrity Doppelgangers: Actors Who Look Alike
#1 Al Pacino / David Naughton
Before Pacino II (round about the time of Scarface), there was a pretty strong resemblance between the sweary thesp and the unlucky lead of American Werewolf in London (1981). Naughton was born 11 years after Pacino.
#2 Anthony Hopkins / Mikhail Baryshnikov
Best known in recent years for a 9-episode stint as Aleksandr Petrovsky in the 2003-04 season of Sex And The City, the legendary dancer has turned into Sir Anthony only in recent years. No more fava beans for him.
#3 Ben Gazzara / Robert Desiderio
A TV regular on shows like The Sopranos and Ugly Betty, Desiderio's longest stint was as Ted Melcher at the shank end of Knots Landing. A high forehead and compact chin gains him easy admittance to Jackie Treehorn's exclusive locales.
#4 Charlie Sheen / Balthazar Getty
His name's straight out of Dickens but Getty's DNA seems to be sleeping in Martin Sheen's guest-house, even if those Dan Dare eyebrows and formidable chin have brought him slightly less personal-life turbulence than his face-sake.
#5 Alan Rickman / Tom Green
Canadian rapper/actor Green has humped his last moose in his search for mainstream acceptability with Jay Leno and as a contestant on The Apprentice, but - by Grabthar's hammer! - he won't shake off the Sheriff of Nottingham so easily.
#6 Alexandra Bastedo / Deborah Harry
Bastedo, star of The Champions, and Videodrome actress Harry share an exquisite 'jawness' and mesmerising eyes that have seen both top the charts as 'most beautiful woman in the world' in their time. Did you spot Bastedo in Batman Begins?
#7 James Franco / James Dean
Compared at various times to Hayden Christenson and Heath Ledger, Spiderman and Pineapple Express heartthrob Franco wins the Martin Sheen gold star for a credible comparison with the poster-legend from Rebel Without A Cause.
#8 Jessica Alba / Arielle Kebbel
With more combined cheek than an elephant's arse, these wide-faced wonders have both graced the pages of Maxim, with Grudge 2/Uninvited actress Kebbel doing a shoot in 2004. Alba also did a photoshoot for the pages of GQ.
#9 Nicolas Cage / Michael McDonald
McDonald left Fox's MADtv after 10 years as longest-serving cast member, but since Nic Cage dumped the carbs for the likes of Ghost Rider he has had to share his face as well as his name (with the ex-singer of The Doobie Brothers).
#10 Alan Cumming / Paul Reubens
Can Paul Reubens really shake off the problematic press since 1991 and come back with Pee-wee's Playhouse: The Movie (2009)? In any case, if he gets into any more trouble, GoldenEye/X2 actor Cumming is a dead on doppelganger.
#11 Gwen Stefani / Brittany Murphy
A gaunt aspect and certain 'Cruella De Ville' sharpness to the chin defines the similarity here. This 'Reese Witherspoon special' doesn't suit everyone; but Brittany (or Britney, if you haven't got the energy for that extra syllable) and Gwen carry it off.
#12 Adam Sandler / Jason Biggs
Sandler's biopic is at least partly cast: American Pie actor Biggs - currently in Lower Learning - causes confusion worldwide: "Hey, that guy looks a bit like Adam Sandler. No, hang on, he's not Sandler but he is famous. Doesnotcompute"
#13 Sandra Bullock / Rosalyn Sanchez
Rush Hour 2's Sanchez, a one-time 'Miss Puerto Rico Petite', shares a large but soft jawline with the 14th-richest female celebrity of 2007, though she has a more refined nose and lower lip. Bullock's next release is All About Steve (2009).
#14 David Bowie / Billy Drago
Compared also to Jack Palance and Airwolf's Jan Michael Vincent, Hills Have Eyes and X-Files actor Drago shares a predilection for sci-fi and horror with the man who fell to Earth, who played a mad scientist in The Prestige.
#15 Christian Bale / James Brolin
There's a certain generic uniformity to the Dark Knight actor's face that finds him compared to more other actors than we can list here, but 70s hunk Brolin - father of Josh - could comfortably be BatDad.
