The 'Euphoria' star died on Monday, July 31. He was 25.
Cloud's co-stars and friends took to social media to honor the late actor, including model Sydney Martin, who was Cloud's rumored on-off girlfriend. Martin made a brief cameo on the second season of Euphoria.
After Martin posted a series of broken heart emojis just as the news of Cloud's death came out on Monday, she later took the time to share some photos of Cloud as well as personal videos of them together.
"My heart is so broken," Martin wrote on her Instagram Story over a tribute photo of Cloud. "I love you forever."
She added a heart emoji and an angel wing emoji.
She also shared a video of Cloud smoking and wearing a furry hat with her smiling in the background, writing, "A song he loved."
Martin also posted a series of photos of herself and Cloud cuddling up together, kissing, and holding hands.
She also shared some graffiti artwork seemingly done by Cloud, which showed a Christmas tree with the message: "Merry X-Mas I love you - Angus 2021."
Martin commented on the photo, "I will never let the world forget you. Bless bless 1 love."
A source close to Cloud's family told ET that the late actor "had been battling severe suicidal thoughts."
"Angus had been battling severe suicidal thoughts after getting back from Ireland, where Angus and his family laid his father [Conor Hickey] to rest," the source said. "Angus was staying with his family as he tried to work through overcoming the grief."
While Cloud's family didn't share his cause of death, they noted, "Angus was open about his battle with mental health and we hope that his passing can be a reminder to others that they are not alone and should not fight this on their own in silence."
"We hope the world remembers him for his humor, laughter and love for everyone," the statement concluded. "We ask for privacy at this time as we are still processing this devastating loss."
TMZ, who was first to publish the news of Cloud's death, reported that the Oakland Police Department and Fire Department responded to a 911 call made around 11:30 a.m. by the actor's mother, Lisa Cloud McLaughlin.
She reported a "possible overdose" and said her son did not have a pulse, according to the outlet. TMZ additionally reported that Cloud was pronounced dead on the scene.
A source close to Cloud's family told ET, "Angus had been battling severe suicidal thoughts after getting back from Ireland, where Angus and his family laid his father to rest. Angus was staying with his family as he tried to work through overcoming the grief."
If you or someone you know is considering suicide, please contact the National Suicide Prevention Lifeline at 1-800-273-TALK (8255), text "STRENGTH" to the Crisis Text Line at 741-741 or go to suicidepreventionlifeline.org.