Time Line

1986
The birth. MTV misses out on the ultimate Cribs episode.
1987
The rebirth: The Olsens make their TV debut (as one character) on Full House.
1990
Robert Thorne, now Dualstar CEO, becomes the twins' manager.
1992
Our First Video (their first video) hits stores. Today the twins' 40 titles have sold more than 30 million copies.
1993
The sitcom stars' Q scores reach Fonzie-esque highs, beating Michael J. Fox at his peak.
1994
Full House ends its eight-year run. Later in 1995, the twins' first movie, It Takes Two, premieres. It makes $19.5 million at the box office.
1996
The girls release their first books. To date, the twins have sold 29 million copies.
1998
Two of a Kind premieres on ABC. It's canceled eight months later.
1999
The girls get their first on-screen kisses in Passport to Paris.
2000
The girls launch a magazine, unveil a line of dolls, and introduce a clothing line at Wal-Mart.
2001
Mary-Kate is nominated for a Daytime Emmy for her role in So Little Time. She loses.
2002
The sweet 16s get a pair of Range Rovers.
2004
Slumber parties in the office? As 18-year-olds, the twins will become co-presidents of Dualstar, according to CEO Robert Thorne.

Thanks to Fortune.com for all of this information.