Nikki Bella and her sister Brie show off their growing bumps

WWE twins Nikki and Brie Bella were showcasing their growing bumps on Thursday, as they admitted they're getting 'tired' with just weeks to go until their due dates.

They're both due to give birth just a week apart, Daily Mail Online claims.

Nikki - who is 33 weeks pregnant - sported a pretty leopard print dress as she stroked her growing bump, admitting she's become more tired as her baby begins to nest.

She told her followers: 'Do you know what I love about being pregnant with my sister you just want to lounge and complain like ''why am I so tired?''

'So we've been filming for Total Bellas which we're excited because season six is coming to you this fall. Right now it's 12:30 in the afternoon and we're ready for bed. 

'We know why, these babies are getting us.'

WWE star Brie is awaiting the birth of her second child with husband Daniel Bryan. They are already parents to daughter Birdie Joe, three.

Nikki is expecting her first child - a boy - with fiancé Artem Chigvintsev.

Meanwhile Brie - who is just a week further along than her sister at 34 weeks - joked that her plunging lilac mini dress resembled a kitchen apron, before twirling to highlight her own blossoming bump.

Nikki joked: 'It's really cute, but when she walked in I said are you wearing a kitchen apron?'