Levi Johnston requests in the court filing to have as much time with his son as Tripp's mother does. Credit: Steven Lawton/FilmMagic; Frederick M. Brown/Getty Images

Sounds like there's a new fight brewing between Bristol Palin and her ex. A new court filing unveiled by the Associated Press on Thursday, Nov. 7, reveals that Levi Johnston recently filed a petition seeking equal custody of his son with Bristol Palin.

Johnston, 23, requests in the court filing to have as much time with his son, Tripp, as the 4-year-old's mother does. The 23-year-old mom and star of Lifetime reality series Bristol Palin: Life's a Tripp, however, fired back through her lawyer, who told the AP that Johnston owes a whopping $66,000 in child support as of Oct. 15.

Johnston and Bristol first made waves leading up to the 2008 presidential election when vice presidential candidate Sarah Palin announced that her teenage daughter was expecting a baby with her fiance Johnston. The couple continued their rocky relationship -- breaking off their engagement weeks after welcoming Tripp in Dec. 2008 and getting re-engaged in July 2010 -- and splitting for good in Aug. 2010.

Johnston, who posed for Playgirl in 2010, went on to marry Sunny Oglesby in Oct. 2012 -- just one month after his daughter Breeze Beretta Johnston (now 12-months-old), was born. They now live in Wasilla, Ak.