Sharing a photo of herself and Vin Diesel from the set of the latest film, Michelle wrote: 'Ride or Die through thick and thin 15 years later surreal to think we made it through such a tough painful production. But this ones for you P I hope we make you proud love you.[sic]'
Michelle, Vin and Paul all starred together in the very first Fast and the Furious film 13 years ago, and had reunited for Fast and the Furious 7 before Walker's untimely death in November.
The film was completed using Paul's younger brother Cody, 25, who stepped in for crucial scenes.
40-year-old Paul Walker died in November 2013, when the Porsche Carrera he was travelling in as a passenger crashed and burst into flames - killing both him and the driver.
Tragically Paul had just spoken of his excitement that his daughter Meadow was moving to California to work on their relationship.
PAUL WALKER'S DEATH SUNGLASSES PUT UP FOR AUCTION
Long-term friend Michelle shared several other snaps from the Fast and Furious set this week, including one of her and production members celebrating in the 110 degree heat.
Back in December, Michelle shared her heartache with the world, posting a picture of herself and Paul with the words: 'I'm gonna carry this torch for you brother, with a forced smile on my face and Im gonna open my heart just cause your telling me to[sic].'