Porn is not the only place you can find twins in movies. The following five actors played their own twins in movies and turned in some fascinating performances playing both sides of a sibling rivalry. Actors have the opportunity to show off their skills by playing both light and dark characters and multiple personalities. Adam Sandler put on a dress to play his own twin sister in “Jack/Jill” in 2011, but will he match these famous dual performances?

Eddie Murphy in "Bowfinger"

Murphy’s late career has been an endless parade of multi-character performances such as “Coming to America,” “The Nutty Professor” and “Norbit.” In “Bowfinger” he pairs down to twin brothers: action movie star Kit Ramsey and his awkward, shy twin Jefferson "Jiff" Ramsey. Steve Martin plays  the desperate Hollywood producer who attempts to make a movie by secretly capturing Kit on film, using his brother for close-ups. The slapstick comedy jabs at movie star pretensions and Hollywood wanna-bes in equal measure.

Nicolas Cage in "Adaptation"

Another behind-the-scenes Hollywood satire casts Nicolas Cage as screenwriters Charlie and Donald Kaufman, identical twins with opposite personalities. The ever-morose Charlie, dejected by women, aspires to make his film writing meaningful in the face of Hollywood’s money-based industry. Meanwhile, the happy-go-lucky Donald happily cranks out the genre crap the movie studios love, while enjoying the flock of beauties that jump in his bed.

Lindsay Lohan in “The Parent Trap” (1998) and “I Know Who Killed Me” (2007).

Lohan doubled up twice as twins in two very different films. During her Disney years, Lohan recreated the identical twins who were separated in infancy that Hayley Mills played in the 1961 original "The Parent Trap." As both Hallie Parker and Annie James, eleven-year old Lohan admirably pulled off the contrasting posh British tween and the California tomboy and made herself a star. By 2007, Lindsay was gyrating on a stripper pole and getting tortured by a sexual predator in a D-movie horror flick about two twins separated at birth. This double feature can demonstrate the sad downward trajectory of Lohan’s once-promising career.

Leonardo DiCaprio in "The Man in the Iron Mask"

In this classic story from Alexandre Dumas’s “The Three Musketeers,” a mysterious masked prisoner is rumored to be related to the King. The legend derives from actual history. In 1669, Louis XIV’s minister requested special arrangements for a prisoner called Eustache Dauger, who was to be kept behind several doors (to prevent any other prisoners from overhearing him) and executed if he spoke of anything beyond his immediate needs. In this film version of the legend, DiCaprio plays the hedonistic King Louis XIV as well as the prisoner now called Philippe, who is actually the secret twin brother of the King. The kind and compassionate brother must be kept in hiding to prevent dynastic warfare.

Jeremy Irons in "Dead Ringers"

In this dark and twisted tale from David Cronenberg, Oscar-winner Jeremy Irons plays twin brothers and gynecologists, Elliott and Beverly Mantle. The brothers enjoy trading places for fun and females. Then, Beverly falls in love with Claire (Geneviève Bujold) and wants to put an end to the identity-switching, which incites his brother’s sadistic and controlling side in the creepiest fashion imaginable.