But now, the 27-year-old actress is heading for round two.
The "Transformers" actress and husband Brian Austin Green have announced they are expecting a second baby, reports the New York Post.
"I can confirm Megan is expecting her second child with her husband Brian -- they are both very happy," Fox's publicist told the news agency.
Fox kept her pregnancy quiet while filming "Teenage Mutant Ninja Turtles" with "Transformers" director Michael Bay.
Fox and Green tied the knot in 2010 and welcomed Noah on Sept. 27, 2012.
Fox is reportedly still in early stages of pregnancy, and there is no official due date reported.