"I woke up this morning to the news that tWitch is gone," she wrote on Instagram ... "We had a lot of good times on the set of Magic Mike. He was so sweet, kind and generous," continued Pinkett ...

The “Magic Mike XXL” actor passed away from a self ... In the book, she writes that tWitch had been high throughout the day and was showering less and less before his Dec. 13 death.

Stephen "tWitch" Boss is being laid to rest ... He also appeared in many high-profile films and shows, including Magic Mike XXL, Modern Family and Step Up All In. Offscreen, Boss frequently ...