The richest 90210 cast member may come as a surprise. Hilary Swank had a short stint on the show in 1997 as Carly Reynolds, a single mother and love interest for Steve Sanders. But she was written out after just 16 episodes.

The setback was clearly a blessing in disguise. Two years later, Swank won her first Best Actress Oscar for Boys Don't Cry, then bagged a second for Million Dollar Baby in 2005.

With a Hollywood career that also includes Insomnia, Freedom Writers, Amelia, and P.S. I Love You, she is by far the wealthiest name on the list.

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