Brooke Shields' new memoir, "Brooke Shields Is Not Allowed To Get Old," is out now, and the 59-year-old model and author shares it all, opening up about her first marriage to tennis pro - Andre Agassi.

Taylor Hill/Getty Images Brooke Shields never had a baby with her ex-husband, Andre Agassi - a decision she says turned out to be a blessing in disguise. "I'm glad I never got pregnant with my first husband because it would have been a disaster,

In her new book, 'Brooke Shields Is Not Allowed to Get Old,' the actress-model shares she “never expected” what ex-husband Andre Agassi said about her weight.

While Shields and Agassi were clearly not compatible, she did get her happy ending. The Calvin Klein model went on to marry television writer Chris Henchy in 2001. And, after seven rounds of fertility treatment, she welcomed her first child, a daughter named Rowan, in 2003. Three years later, she had a second daughter named Grier.

Brooke Shields has told how she's "glad" she never had a baby with ex-husband, Andre Agassi. The Blue Lagoon star confessed that she and former husband wouldn't have made good parents together. Writing in her memoir,