Image Source: Getty / Michael Tran [1]

Michael Phelps and Nicole Johnson are expanding their family! On Tuesday, the former Olympic swimmer revealed that he and his wife are expecting their second child. Along with an Instagram photo [2] of Nicole and their adorable 1-year-old son [3], Boomer, Michael wrote, "Number 2 on the way!!!! So excited!! Wonder if it's a boy or a girl??" Michael and Nicole tied the knot [4] not once but twice, in June 2016 and again in October 2016. Congrats to the couple!

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