Maron took to Twitter on Monday to express his continued grief at her loss.
“i miss her,” he captioned a photo of the two of them.
Shelton, a TV director and filmmaker who most recently helmed episodes of Hulu’s “Little Fires Everywhere,” died May 16 at the age of 54 from a previously unidentified blood disorder. Reese Witherspoon, Kerry Washington and Mindy Kaling are among the other stars who have mourned her death.
"I loved her very much as I know many of you did as well," Maron said at the time in a statement to TODAY. "I am leveled, heartbroken and in complete shock and don’t really know how to move forward in this moment. I needed you all to know."
"We were starting a life together," he continued. "I really can't believe what is happening. This is a horrendous, sad loss."
A few days after her death, Maron also addressed her passing on his podcast, “WTF with Marc Maron.”
"I was definitely a better person when I was engaged with her, as a comic, as a guitar player, as a human, as a lover, as everything,” he said. “I was better in Lynn Shelton's gaze. ... I lit her up. She lit me up. ... I loved everything about her. She was so good at everything."