Mila Kunis and Ashton Kutcher were expecting the birth of their daughter on September 18, though the baby has yet to come out.

The delay in Kunis' delivery is making Kutcher nervous, as the actor stated in a post on his Twitter account.

"Nervous is excited's victim sister," Kutcher wrote.

Friends of the actor are confirming the anxiety.

"He is a nervous wreck," a source told People.

"They were hoping the baby would come this week because he's on hiatus [from his show Two and a Half Men]," the source added.

Nevertheless, Kutcher and Kunis are more than excited for the arrival of their baby.

Kunis has been active all throughout her pregnancy, practicing pre-natal yoga and frequently taking walks around her neighborhood.

In a separate report, it has been revealed that Kunis initially opted for a medication-free natural birth, but Kutcher insisted on having sedatives at play. Since Kunis is a small girl, the doctor advised that a natural birth would not be the best route to take.

"Mila was going to do an all-natural birth with no medications or sedatives, but she has been advised against this because she is such a small girl...Ashton will not accept this and refuses to see her in pain," another source said to Radar Online.

Both Kunis and Kutcher have openly expressed their desire for a big family, and it won't be surprising if Kunis gets pregnant again just months after giving birth to their first daughter.