According to the website, Brady was spotted wearing a diamond ring on Christmas Day while the couple were vacationing in Hawaii, but it's unclear when Tyler proposed.
Peoplereported that Tyler's representative declined to comment, however according to a subsequent TMZ report, the 63-year-old Aerosmith lead singer's family is furious over the engagement because they don't approve of his 38-year-old fiancee and believe she is "just not nice."
"She's just been mean to the family," a source told TMZ.
Tyler's family reportedly didn't learn of his plans to pop the question until after he proposed and the engagement became official, leaving his loved ones even more upset and standoffish toward Brady.
Tyler first wed model Cyrinda Foxe in 1978 but their marriage ended nine years later. The Idol judge then married clothing designer Teresa Barrick in 1988, but the couple split in 2006 and Tyler began dating Brady shortly afterwards.