Jimmy Fallon has been pushing for a Saved by the Bell reunion for quite some time now and it appears he might be getting closer to achieving his dream.

This week, Zack Morris (played by Mark-Paul Gosselaar) was a guest on Late Night with Jimmy Fallon where he conducted the entire interview in his former character, Mr. Zack Morris.

Mark revealed that he was 100 percent in favour of returning to the Late Night Show for a formal Saved by the Bell Reunion, where 5 of the 7 main characters have agreed to meet.

According to sources, Zack (Mark-Paul Gosselaar), Slater (Mario Lopez), Lisa (Lark Voorhies), Jessie (Elizabeth Berkley) and Mr. Belding (Dennis Haskins) have all agreed to join the Saved by the Bell reunion while decisions remain up in the air for Kelly Kapowski (Tiffani Amber Thiessan) and Screech (Dustin Diamond).

While all of the cast mates have gone their separate ways since the show ended in 1993, the only one who has reason to refuse to join the reunion would be Dustin Diamond. While some of the cast members went on to secure high profile roles in hit shows like Beverly Hills 90210 (Tiffany Amber Thiessan) and Extra (Mario Lopez), the only headlines Dustin has made since wrapping up the series was a high profile sex tape. Eww.

But how much have the cast members changed since their final days in 1993 – and what can you expect them to look like when they show up for the reunion special?

Take a look below and let us know what you think. Who looked better before and who looks better now?

*Click Photos to Enlarge

       Dustin Diamond (Screech)                   Lark Voorhies (Lisa)

      Mario Lopez (AC Slater)                       Tiffani Amber Thiessan (Kelly)

     Mark Paul Gosselaar                             Elizabeth Berkley (Jessie)