Washington, Dec 17 : Hollywood actress Jessica Alba is set to appear in the hit NBC sitcom `The Office'.

The `Fantastic Four' star will be the guest star in an hour-long episode of the show to air following the Super Bowl on February 1 on NBC.

In the episode, titled "Stress Relief," some of the office workers secretly watch a bootleg Hollywood movie starring Alba and Jack Black during the workday, reports Usmagazine.

Meanwhile, the 27-year-old actress, who gave birth daughter Honor in June, has shown off her post-baby shape in Campari's 2009 calendar.

In the fine-looking photos shot in Malibu by Mario Testino, Alba is featured wearing a bathing suit, evening gown and short shorts. (ANI)