The couple issued a joint statement to Us Weekly saying they were ending their three-year marriage, E! Online reported.
"This is the mutual decision of two people with an enormous amount of respect and admiration for each other," the statement released Wednesday said. We hope that you respect our privacy during this difficult time."
Reps for both singers have been kept busy in recent months denying reports that the couple was calling it quits, E! noted. However, they have both been making public appearances spouse-free, which kept fueling talk of a split.
The couple skyrocked to fame with their MTV reality show, "Newlyweds: Nick & Jessica." Since then, however, Lachey has watched his wife release a hit album, star in a blockbuster movie and release her own line of cosmetics.