There are certain celebs out there in showbiz land that should feel secure in the fact that if their careers ever take a nosedive then they will always be able to make a decent living impersonating their still-famous doppelgangers.
From the spookily uncanny (can you spot the difference between Natalie Portman and Keira Knightley?) to the downright silly (Benedict Cumberbatch and Ice Age Sid, anyone?), if you're a celeb there's a big chance you've got an almost-as-famous lookylikey.
Take at look at the stars who'll make you do a double take in our gallery below and see how many you can tell apart...
Celebrity Lookalikes
Celebrity Lookalikes(01 of50)
Scarlett Johansson and Amber Heard
Celebrity Lookalikes(02 of50)
Actor and comdian Rob Brydon and 'Strictly' dancer Anton du Beke (credit:Getty)
Celebrity Lookalikes(03 of50)
'X Factor' star Cher Lloyd and her mentor, Cheryl Cole (credit:Getty)
Celebrity Lookalikes(04 of50)
'Sherlock' star Benedict Cumberbatch and Ice Age Sid from 'Ice Age' (credit:Getty / 20th Century Fox)
Celebrity Lookalikes(05 of50)
Kirstie Alley and Fergie
Celebrity Lookalikes(06 of50)
Singing legend Cher and plastic surgery addict, Pete Burns (credit:Big Pictures)
Celebrity Lookalikes(07 of50)
Nicolas Cage and a painting of the Virgin Mary
Celebrity Lookalikes(08 of50)
Actresses Natalie Portman and Keira Knightley (credit:Getty)
Celebrity Lookalikes(09 of50)
Johnny Knoxville and Josh Duhamel
Celebrity Lookalikes(10 of50)
Former supermodel Christy Turlington and US actress (and Mrs Justin Timberlake), Jessica Biel (credit:PA)
Celebrity Lookalikes(11 of50)
Anne Hathaway and Francisco de Goya y Lucientes' "An Officer"
Celebrity Lookalikes(12 of50)
Ian Somerhalder and Rob Lowe
Celebrity Lookalikes(13 of50)
Fashion designer Donatella Versace and Janice from The Muppets (credit:WENN / Rex)
Celebrity Lookalikes(14 of50)
Bill Murray and Edgar Allan Poe
Celebrity Lookalikes(15 of50)
Miley Cyrus and Gwen Stefani
Celebrity Lookalikes(16 of50)
Ryan Phillippe and Justin Timberlake (credit:Getty)
Celebrity Lookalikes(17 of50)
Angelina Jolie and Megan Fox (credit:Getty)
Celebrity Lookalikes(18 of50)
Elijah Wood and Daniel Radcliffe (credit:Getty)
Celebrity Lookalikes(19 of50)
Jennifer Connelly and Lily Collins
Celebrity Lookalikes(20 of50)
US actor Will Ferrell and Red Hot Chili Pepper star Chad Smith (credit:WENN)
Celebrity Lookalikes(21 of50)
Old School Courtney Love and Lena Dunham (credit:Getty, AP)
Celebrity Lookalikes(22 of50)
Andrew Garfield and Andy Murray
Celebrity Lookalikes(23 of50)
Elizabeth Banks and Chelsea Handler
Celebrity Lookalikes(24 of50)
'Magic Mike' star Channing Tatum and Prison Break's Wentworth Miller (credit:AP / Getty)
Celebrity Lookalikes(25 of50)
Bryce Dallas Howard and Jessica Chastain (credit:Getty)
Celebrity Lookalikes(26 of50)
Amanda Peet and Lake Bell
Celebrity Lookalikes(27 of50)
Cricketer Alistair Cook and 'Superman' star Henry Cavill (credit:PA)
Celebrity Lookalikes(28 of50)
Christa B. Allen and Jennifer Garner (credit:Getty)
Celebrity Lookalikes(29 of50)
Actors Javier Bardem and Jeffrey Dean Morgan (credit:WENN)
Celebrity Lookalikes(30 of50)
Linda Cardellini and Ellen Page
Celebrity Lookalikes(31 of50)
Actors Ralph Fiennes and Bradley Cooper (credit:Getty)
Celebrity Lookalikes(32 of50)
Ellen DeGeneres and Edie Falco
Celebrity Lookalikes(33 of50)
Nicolas Cage and Tennessee man from the Civil War era (credit:Getty, The Thanatos Archive)
Celebrity Lookalikes(34 of50)
Glenn Close and Franz Liszt
Celebrity Lookalikes(35 of50)
Actors Jason Bateman and Ewan McGregor (credit:Getty)
Celebrity Lookalikes(36 of50)
Eva Longoria and Kim Kardashian (credit:Getty)
Celebrity Lookalikes(37 of50)
Kylie Jenner and Lorde (credit:Getty)
Celebrity Lookalikes(38 of50)
Kate Winslet and Rachel Weisz (credit:Getty)
Celebrity Lookalikes(39 of50)
Jaime Pressly and Margot Robbie (credit:Getty)
Celebrity Lookalikes(40 of50)
Roselyn Sanchez and Nicole Scherzinger (credit:Getty)
Celebrity Lookalikes(41 of50)
US singer Jordin Sparks and 'Ugly Betty' star America Ferrera (credit:Getty)
Celebrity Lookalikes(42 of50)
US actress Rachel Bilson and British model Atlanta De Cadenet (credit:PA / AP)
Celebrity Lookalikes(43 of50)
Actresses Carey Mulligan and Michelle Williams (credit:Getty)
Celebrity Lookalikes(44 of50)
Katy Perry and actress Zooey Deschanel (credit:Getty)
Celebrity Lookalikes(45 of50)
Husband and wife Rochelle and Marvin Humes (credit:WENN)
Celebrity Lookalikes(46 of50)
Girls Aloud's Kimberley Walsh and 'Inbetweeners' star Emily Atack (credit:Getty)
Celebrity Lookalikes(47 of50)
Actress (and Mrs Sacha Baron Cohen) Isla Fisher and US actress Amy Adams (credit:Getty)
Celebrity Lookalikes(48 of50)
Mollie King of The Saturdays and actress Sienna Miller (credit:WENN / Rex)
Celebrity Lookalikes(49 of50)
Actress Brigitte Nielsen and singer Pink (credit:WENN)
Celebrity Lookalikes(50 of50)
Singers Kelly Clarkson and Miley Cyrus (credit:Getty)