Carter's Chord's Emily Robertson and Trailer Choir's Marc 'Butter' Fortney are having a baby! The couple, who wed in 2010, were eager to share the happy news today (May 30) that they are expecting a little blue bundle of joy in October.

"We wanted to make a little announcement this morning because we just can't keep it in any longer," the expectant mom shared on her band's website. "We have waited to share the good news with all our fans and it feels so good to be able to tell the world! We feel incredibly blessed to be embarking on this new part of our lives and can't wait to be parents to our little boy. God is oh so good. Hope to see all of you at CMA Music Fest next week. You can't miss the baby bump!!"

Both Carter's Chord and Trailer Choir may need to get bigger tour buses. Butter's bandmate Big Vinny (Vincent Hickerson), proposed to his longtime girlfriend, Lori Diaz earlier this year, which will make him a step-parent to her son, Brennon. Meanwhile, Emily's sister Becky wed music producer Jeremiah Scott last month.

Congratulations to the parents-to-be!

Watch Carter's Chord's "Love a Little Bigger" Video

See Photos of Emily and Other New Musical Moms