This is a list of the top ten most famous and not so famous twins of all time. Some of these twins you will recognize. And in some cases both of twins are both famous, while in other cases only one twin is famous and the other is so little known that you probably didn't even know they had a twin.

These legendary founders of Rome were said to have been the sons of the Roman god of war, Mars, and to have been raised by wolves. If that wasn't enough, they went on to found the City of Rome which grew into the greatest empire that the world has ever seen.

Unfortunately a dispute between the two twin brothers led to Romulus killing Remus. Which apparently is why the city was afterwards called Rome and not Remulus.

What?! You mean Elvis had a twin brother?!

Yes, it's true. Elvis had a twin brother. Unfortunately, his twin brother Jesse Garon died at birth. I bet the guy would have made the ultimate Elvis impersonator.

Of course, if you believe the conspiracy theories that Elvis is still alive ... maybe Elvis's brother didn't die at birth but instead lived on into adulthood and is now buried in Elvis's place, allowing Elvis to enjoy his retirement.

These twin sisters both became advice columnists and gave out advice for over fifty years, suggesting that their genes may have had something to do with their career choice.

Mary-Kate and Ashley Olsen started their careers on the 1980's sitcom "Full House" where they each played the same character. Because of laws limiting the hours that children their age could work, the producers hired twins and got the laws by having the twins split the acting between them. As a result, in a move guaranteed to create an identity crisis and require years of therapy, both Olsen twins played one half of the same character.

Now all grown up, Mary-Kate Olsen apparently knows how to help drug overdose victims because she was the first person that Heath Ledger's housekeeper thought of calling when she discovered Ledger unconscious. Calling 911 apparently was not her first choice.

Jarosław and Lech Kaczyński - hardly household names in this country but they are quire famous in their native Poland where they started as child actors and then became its Prime Minister and President (at the same time). There is hope for the Olsen twins too.

Tegan and Sara Quin are identical twins and indie singer-songwriters. Although not superstars, their albums and songs have been praised in the music media and fellow musicians. Their CDs have been featured on several influential "best of" lists. In 2004, Rolling Stone magazine named their album So Jealous as one the best 50 albums of the year.

The Kray Brothers (Reggie and Ronnie Kray) were notoriously violent underworld bosses that dominated London's East End in the 1950s and 60s. They were implicated in arsons, extorsion schemes, and the murder and torture of rivals. These gangsters were eventually caught and convicted in 1969 and sentenced to life in prison.

Chang and Eng Bunker were two conjoined twins from Thailand (formerly known as Siam) that emigrated to the Southern United States. They became world-famous. Their condition and birthplace (Siam) gave rise to the term "Siamese Twins".

Despite being joined together, the original Siamese twins enjoyed successful lives. They became rich farmers, married (two non-identical sisters), had children. Incredibly, the Siamese twins were accepted as respected members of White pre-Civil War society and were even slave owners.

Their conjoined status created some oddities in their personal lives. When the twins first married they set up a communal household but their wives did not get along and so the twins set up separate homes, with the twins dividing their time between each home.

Justin Timberlake had a twin sister Laura Katherine who died shortly after birth. He sometimes mentions her in the liner notes of his CDs.

These gorgeous ladies are the surprisingly single twin sisters of Marge Simpson, on the cartoon show the Simpsons. If any twins out there are looking for love, these gals are a great catch!