Prince William has officially returned to work amid the pregnancy rumors surrounding Kate Middleton. As he met with the U.K. firefighters in South London to celebrate the Emergency Services Day on Thursday, Sept. 9, without his wife, is this enough evidence that she is indeed pregnant?

Rumors about Kate's pregnancy are once again rampant as she has been out of the spotlight as of late. The Duchess o Cambridge usually takes some personal time when pregnant, so what are the other proofs she is now expecting their fourth child?

According to 7News, Kate has not been seen in public for more than 60 days. This gives birth to rumors that she has a bun in the oven, though it is yet to be confirmed.

It has been known that the future Queen Consort is experiencing severe morning sickness whenever she is heavy with a child, so some say this is why she is missing in action. The last time the public saw her was when she joined her husband and eldest child at Wembley Stadium for the Euro 2020 football final on July 11.

Since then, she had yet to go out and about. Her last social media appearance, on the other hand, was when the Cambriges' official Instagram page shared a photo of her on Aug. 6.

However, the snap in question was said to be taken in January with a Holocaust survivor. So, is Kate hiding something, like her growing baby bump?

Royal commentator Russell Myers shut down the claims about her alleged pregnancy, though he admitted it could be possible, Express noted. He said there might be another reason why Prince William's wife stayed away from the limelight.

Kate might only be taking her much-deserved rest, away from the public's eyes and the media's gaze. The royal pair has been on holiday and it has been their usual practice to take some time off.

Myers revealed there is an agreement between the royals and the press that they will not be followed when they are on holiday. So, it may be the reason why there are no photos of them circulating online.

As Prince William is now back to work, Kate may also make a public appearance soon. So, will fans see her having a baby bump?

Myers stressed anything is possible after what happened due to the COVID-19 pandemic. However, the pregnancy rumors about Kate may only be mischief-making, though he knew anything could happen.