Originally appeared on E! Online

Mandy Moore will never regret meeting her hero, Diane Keaton .

The actress, who portrayed Keaton's onscreen daughter in the 2007 film "Because I Said So", paid tribute to the Oscar winner after her death on Oct. 11 .

"They say don’t meet your heros but I got to work with one of mine and even call her 'mom' for a few months," Moore wrote on Instagram alongside an image from the movie. "An honor of a lifetime."

A spokesperson for Keaton, who is survived by kids Dexter and Duke, confirmed her death to People , noting no further details on her passing are available at this time.

"What an incandescent human Di is and was," Moore continued. "I am so sad she’s gone for all the reasons but also because it felt like she’d be here forever, dazzling us

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