The writer helped the former president develop his best-selling memoirs before Grant's 1885 death.

The "I Love Lucy" actors had instant chemistry, but often struggled during their 20-year marriage.

Theories of mafia involvement have made headlines since the president's November 22, 1963 assassination.

Putting all his “new friends” in front of the camera was just one of the ways that the children’s television star showed he cared.

On her coast-to-coast visit of the United States, Queen Elizabeth II’s younger sister made an impression with Hollywood elites and Washington D.C. leaders like Lyndon B. Johnson.

Fred and Joanne Rogers shared a long and loving relationship, which she continues to honor by carrying on his legacy after his 2003 death.

After getting a personal invite to a 1985 White House party, the "Grease" star dazzled the royal on the dance floor.

Following their historic walk on the moon, Neil Armstrong, Buzz Aldrin and Michael Collins visited the monarch at Buckingham Palace.

After a deal went sour, the automotive brands went head-to-head at Le Mans in 1966.

The minister-turned-host of "Mister Rogers Neighborhood" found dual meaning in the digits that popped up on his scale every morning.

These mafia members continue to be household names long after their deaths.

Deodorant, drunken antics and a breakup fueled the creation of the song that launched grunge into the mainstream and made the rocker a household name.

For more than 50 years, the country superstar has been married to a man who prefers to remain of the spotlight.

What started off as romantic turned into a decades-long friendship between the singer and her closest companion.

From the King of Rock ‘n’ Roll to a Golden Girl, our nation’s veterans have also conquered politics, the arts — and even space travel.

The up-and-coming songwriter and country music singer found common ground on a crossover classic that cemented both artists' reputations.

Despite many ups and downs — including two divorce filings — the pair still recorded some of the best duets in country music history.

The country singer tragically died five days before his illegitimate daughter, Jett, was born, and it took her more than 20 years to discover his identity.

The country star was supposed to be on the plane that crashed and took the lives of Buddy Holly, Ritchie Valens and the Big Bopper on February 3, 1959.

Adopted at birth, the country singer was determined to find her "missing link."

Immediately drawn to each other, the country singers navigated rocky roads before and throughout their marriage.

The reigning king and queen of country music met as struggling unknowns. Decades later they would wed as world-famous entertainers.

From hopes of becoming a professional athlete to global success as a country music superstar, Brooks has kept true to his parents’ ideals of dreaming big but staying realistic.

Take a look at photos of these mafia members after their arrests.