Joaquin Phoenix will wear the same tuxedo throughout this year's awards season.
McCartney, who emphasizes sustainability in her luxury brand, tweeted a pic on Monday of Phoenix in the tux and the caption, "This man is a winner… wearing custom Stella because he chooses to make choices for the future of the planet. He has also chosen to wear this same Tux for the entire award season to reduce waste. I am proud to join forces with you... x Stella."
Phoenix accepted the award for Best Actor in a Motion Picture -- Drama on Sunday night. In addition to praising his fellow nominees, thanking Joker director Todd Phillips and briefly doting on his fiancee, Rooney Mara, the 45-year-old star's speech focused on environmental impact -- expressing a plea for help to fight the devastating Australia bushfires and calling out actors who take private jets.