Donna Martin is returning to 90210.

While this exciting casting note has been made public already, E! Online has released more information about what brings Donna back to town. To wit:

• There's trouble in her marriage to David;
• Donna is thinking about opening a clothing store in Los Angeles;
• She's already a huge fashion success in Japan.

Meanwhile, Matt Lanter has been overshadowed a bit by the return of Tori Spelling.

But this actor soon joins the cast as Liam, a bad boy that star AnnaLynne McCord says her character falls for.

After all, "he is the bad boy," McCord said, "and Naomi starts to love herself some bad boy…"

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.