Mark your calendars "Precious" fans! Gabourey Sidibe will be hosting "Saturday Night Live."

Live from New York ... It's Gabourey Sidibe!
Gabourey's rep confirmed to People that the young actress will host the sketch show next month -- but rumors that her pop star crush Justin Timberlake has signed on as the musical guest are bogus. MGMT will perform.

Her ep will air April 24th -- Ryan Phillippe, Tina Fey, Ke$ha and Justin Bieber are also scheduled to appear this month.

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