Elizabeth Chambers Hammer and Armie Hammer Elizabeth Chambers Hammer and Armie Hammer

And then there were three.

Actor Armie Hammer and his wife, journalist Elizabeth Chambers, have welcomed their first child, People reports. The baby girl, whose name has not yet been revealed, arrived safely on Monday, Dec. 1. "Both mom and baby are doing great!" his rep tells the magazine.

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Hammer, best known for his work in The Lone Ranger and The Social Network, will next appear in Guy Ritchie's remake of The Man From U.N.C.L.E. Chambers is the chief correspondent for the Human Rights Foundation and has also reported for E! News.

The couple, who also own Bird Bakery in San Antonio, Texas, announced their pregnancy in June. They have been married since 2010.

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