Michelle Trachtenberg, the actress who rose to fame as a precocious child star in “Harriet the Spy” and went on to have memorable roles on TV shows including “Gossip Girl,” has died, according to the New York City police.

Lively remembered Trachtenberg as someone who "laughed the fullest at someone's joke" and "faced authority head on when she felt something was wrong."

Blake Lively, David Boreanaz, Ed Westwick, Kim Cattrall, Kenan Thompson, Melissa Joan Hart and more shared tributes to Trachtenberg.