Alan Jackson has joined the lineup for Zac Brown Band 's Southern Ground Music & Food Festival in Nashville coming up September 21 and 22. Alan is set to join the band for their show on one of the two nights. The two acts teamed up for the #1 hit "As She's Walking Away" in 2010 and collaborated again on the song "Dixie Highway" on Alan's latest album, Thirty Miles West .

Gregg Allman will also join Zac Brown Band at the Nashville festival along with David Gray , Los Lonely Boys and Amos Lee .

The other Southern Ground Festival takes place October 20 and 21 in Charleston, SC. Go to SouthernGroundFestival.com for all the latest details.

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