Pregnant Carrie Underwood has canceled two planned appearances 'due to illness'

After announcing her pregnancy last month, the singer has already had to cancel two shows in the United Kingdom owing to an undisclosed illness.

Carrie Underwood took to Instagram on August 8 to share that not only is she planning a tour for next year, but she is also pregnant with her second child with husband Mike Fisher.

Unfortunately, it seems her pregnancy is taking a toll on her health, as two performances over the weekend in the UK had to be cancelled "due to illness."

Underwood was supposed to headline Saturday night's event at the Long Road Festival, and appear at Radio 2 Live's event at Hyde Park on Sunday.

“Carrie Underwood has been forced to cancel several upcoming promotional activities in the UK,” her record label shared. “She looks forward to resuming promotion for her new album, "Cry Pretty," soon.”

The Long Road Festival took to their Facebook account to share in the disappointment with their fans, but announced that although "Carrie is of course irreplaceable," Aaron Watson had offered to step into her headline slot for the evening.

Danielle Bradbery also volunteered to extend her own set to make up for the lost time in the show.

At Sunday's event, Underwood was touted to appear alongside other artists such as Lenny Kravitz, Rita Ora, and Kylie Minogue.

Both the Long Road Festival and the BBC wished the singer well on her road to recovery, and no further details about her illness have been shared at this time. In all likelihood, she is suffering from morning sickness.

With disappointed fans across the UK, Underwood took to her social media accounts to share a new song from her upcoming album, "Cry Pretty," which is set for release on September 14.

Underwood, who recently called for more female voices to be featured on the country music scene, is gearing up for her Cry Pretty Tour 360 with a number of other women artists set to make appearances along the way.