Casually dressed in a green t-shirt and tattered, cut-off shorts, Megan tried to blend in, but stood out the rest of the crowd with her flowing hair, svelte figure and high heeled sandals.
Brian, who recently appeared on several episodes of Desperate Housewives, is an avid racer and last year finished third place competition.
Megan's weekend at the track comes after she received an apology from her Passion Play co-star Mickey Rourke earlier this week.