The 28-year-old "Tron: Legacy" star is due next year, according to People.com.
Wilde and Sudeikis began dating at the beginning of 2012 after meeting on the 2011 season finale of U.S. comedy show Saturday Night Live. They became engaged in January.
The actress recently told Marie Claire magazine she was looking forward to starting a family with her husband-to-be, stating, "He's so good with kids."
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