The news of Estus' passing was first reported on the musician's official social media accounts.
"It is with real sadness I post that Deon Estus passed away this morning," a post reads on Estus' official Twitter account. "Deon was mostly known as the third member of Wham! Deon was passionate about music and loved interacting with his loyal fans."
Estus, a native of Detroit, Michigan, was behind the 1989 hit song "Heaven Help Me" which reached No. 5 on the Billboard Top 100 Charts at the time. Estus was also the bassist for singer George Michael's first two solo albums.
Estus' only album, Spell, was released in 1989 and also featured the Dance Club Songs hit "Me or the Rumours" and the title track which reached the top 20 on Adult Contemporary charts. According to the artist's bio, Estus worked with several music legends including Tina Turner, Elton John, Marvin Gaye, Annie Lennox, and Frank Zappa.
Estus' partner, Brenda Kaye Pearce shared a tribute to the musician on Facebook after his passing.
"My dearest, closest partner and significant other of 4 years transitioned and all I can remember is our last conversation the day before. My heart will need time to heal. R.I.P. Deon. Love you forever."