The 31-year-old supermodel is rumored to be three months pregnant.
Karolina and Archie are also loving parents to their five-year-old son Tobin, who was born in 2010.
“I feel very different. After having a baby things just change. Something inside of you switches and you become this powerful big mama who can deal with anything and do everything,” Karolina shared to Access Hollywood about motherhood after giving birth to Tobin.
Congrats to the couple!