\"He is the kindest, gentlest, smartest, funniest little beebee and he's our best friend,\" she continued, adding that he's \"pretty much exactly like his namesake\" -- her \"Parenthood\" co-star Miles Heizer.

Whitman and Heizer were TV siblings on \"Parenthood\" for six seasons and have remained close, with each other and with their TV mom, \"Gilmore Girls\" star Lauren Graham, since the show ended.

\"PHOTO:
David Livingston/Getty Images, FILE
PHOTO: Mae Whitman and Miles Heizer attend the Los Angeles Mission's Annual Thanksgiving event at the Los Angeles Mission on Nov. 24, 2021 in Los Angeles.
>

\"We are infinitely grateful he chose us as his parents,\" she said.

Whitman ended her post saying: \"We love you! We're so happy!\"

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