The three dramas are being picked up for a fall launch.
The CW hinted at its plans for "Melrose Place" and "Vampire Diaries" when it gave both pilots permission to start making offers to writers and directors.
With its name recognition and built-in buzz factor, "Melrose" was an instant favorite before a single page of the script was written.
Still, the CW execs waited to watch the CBS Par-produced pilot and liked what they saw.
For the WBTV-produced "Vampire Diaries," based on Alloy's series of books about a girl in a love triangle with two vampire brothers, the network hopes to catch the vampire pop culture wave ignited by the success of the "Twilight" franchise and HBO's True Blood.
It doesn't hurt that both "Melrose" and "Life" have tabloid-friendly stars - Mischa Barton and Elle MacPherson in "Life" and Ashlee Simpson-Wentz. And "Life" is exec produced by Twitter king Ashton Kutcher.
The CW has a couple of other pilots, the Gossip Girl spinoff and "Life Unexpected," in consideration for midseason.