Conor McGregor and Dee Devlin expecting baby number 2.

Dee announced the news on Conor's 30th birthday.

Happy 30th birthday babe! Thank you for being you! Love you to bits from me, Conor jr and the bump ❤

A post shared by Dee Devlin (@deedevlin1) on Jul 14, 2018 at 11:24am PDT

 Source: Instagram (@deedevlin1)

Conor McGregor is set to become a father again.

Girlfriend Dee Devlin took to Instagram to confirm the news in a sweet birthday post.

The UFC star turned 30 over the weekend and was pictured celebrating at Longitude.

Longitude

A post shared by Conor McGregor Official (@thenotoriousmma) on Jul 14, 2018 at 12:53pm PDT

 Source: Instagram (@thenotoriousmma)

Speculation had been mounting after the pair were recently pictured out and about celebrating close pal Garry Vegas' birthday and eagle eyed fans spotted Dee's bump. 

The new arrival will be a little brother or sister for the couple's other child, Conor Jnr, who recently turned 1.