Kel Mitchell and Amanda Bynes were co-stars during their time with the hit 90's show "All That" and now that the show has been rebooted, Mitchell has reminisced on old times and revealed whether or not the two will reunite.

ET Live caught up with the 40-year-old comedian on site of the Good Burger pop-up in Los Angeles recently where he had nothing but kind words for Bynes.

"I love Amanda, she's like [my] little sister. She's so fearless," he told ET. "I remember her being on set, she told me, 'Hey Kel, I wanna do the physical comedy that you do.' So I used to show her little tricks to do that would make her comedy just awesome."

Despite being the one to show the now 33-year-old actress the ropes, Mitchell was very impressed with his former co-star.

"She did everything so great, so awesome, she was super fearless," he added.

It's been almost 15 years since Nickelodeon's comedy sketch series "All That" last aired but that didn't stop the network from ordering a second revival for the series, which premiered June 15.

The "All That" reboot features a brand new cast in front of the camera but Mitchell, along with Kenan Thompson, 41, who is also part of the original cast, returned to the series behind-the-scenes as executive producers. The duo will make guest appearances along with fellow original cast members Josh Server and Lori Beth Denberg. So, that begs the question, will Bynes also make an appearance?

Although the blonde has had a rocky history, she seems to be back on track and recently graduated from fashion school. Now would seem like as good a time as ever for Bynes to get back into acting. And, thankfully, if she wanted, Mitchell made it very clear that she is more than welcome on set of the "All That" reboot.

"That would be crazy! We really want her to do a cameo in 'All That'. We've been talking about that," he told ET. "So, Amanda, come on, girl! Call ya brother up!"

Amanda Bynes
Amanda Bynes attending the MTV Movie Awards at Universal Studios’ Gibson Amphitheatre in Universal City, California on June 5, 2011. Jason Merritt/Getty Images