'Nashville' Cast Rumors: Live Premiere Broadcast, Hayden Panettiere Baby News

Reuters/FileHBO 'Nashville' star Hayden Panettiere and Ukrainian heavyweight boxer Wladimir Klitschko

"Nashville" fanatics will be excited about the good news: ABC announced that the hit show's third season will premiere with a live broadcast performance on Sept. 24 at 9 p.m. and main star Hayden Panettiere is already showing that pre-baby glow during a weekend getaway in Miami, Florida.

First off, show creator Callie Khouri told Radio Times that the third season premiere will feature live musical performances by some of the cast!

As revealed in E! Online, included in the lineup are Chris Carmack (playing the newly out gay cowboy Will Lexington) who will sing "If It's Love," song written by The Striking Matches. This will be followed by Charles Esten (who plays Deacon Claybourne) who will also do a rendition of "I Know How To Love You Now," a song co-written by Esten and Deana Carter.

It will come off live for both the East Coast and the West Coast, the report added. After the East Coast airing, the members of the performing cast will sing live for the second time around to serve the West Coast timezone. Fans will also rejoice as the studio tracks and live song renditions will be immediately made available to download on iTunes!

Meanwhile, 24-year-old mom-to-be Panettiere was last seen flaunting her baby curves and enjoying a sunny day on the shore with her fiance Wladimir Klitschko.

Panettiere has yet to reveal the sex of their baby. Nevertheless, the "Heroes" star had already expressed the desire to start a family with her pro boxer beau back in May 2013.

"I've lived a very big life, and I don't feel my age, and I feel like I was born to be a mother," she said in an interview for her Glamour cover shoot. "Sometimes people speak about [having kids] like, 'Your life ends— you're never going to be able to do anything again!' And I'm like, 'What are you talking about?' Motherhood is the most beautiful, exciting thing, and there's nothing that I feel like I can't accomplish while having children in my life."

The 38-year-old athlete opened up his thoughts with E! News about his upcoming fatherhood as well.

"When you're going to become a father or a parent, your life is going to change," Klitschko explained. "So I look forward to having my life change for the good and I heard, just recently, somebody said, 'You don't know what love is until you have your first baby, then you know what love is.' So I think I know what love is, but I look forward to getting more knowledgeable about that."