They even shared a kiss during the MTV's 2007 New Year's Eve special.
Minnillo and Lachey remained relatively public about their relationship, hitting up red carpets together in good times.
Lachey began working on his third solo album in 2007.
In June 2010, Lachey confirmed that he had parted ways with Jive Records.
He attended Miami University in Oxford, Ohio where he joined Sigma Alpha Epsilon.
In the fall of 1992, he enrolled at the University of Southern California, according to a statement he made during his guest appearance on The Arsenio Hall Show on December 12, 2013.
Their debut album was the self-titled 98 Degrees; however, the band's first real success came with their follow up album 98 Degrees and Rising. 98 Degrees performed a one-off summer reunion show in Hershey, Pennsylvania, at the Summer Mixtape Festival on August 18, 2012, their first concert in more than a decade.
But in the spring of 2009, the pair announced they had split, adding that they "remain good friends who still greatly care for one another." After some time apart, they reconciled.
That brings us to now when the pair announced their engagement.
is an American actor, singer, and television personality.
He rose to fame as the lead singer of the multi-platinum-selling boyband 98 Degrees, and later starred in the reality series Newlyweds: Nick and Jessica with his then-wife, Jessica Simpson.