Kylie Minogue has sent congratulations to her ‘little sister’ – saying her new nephew is ‘gorgeous’.

Dannii gave birth to Ethan Edward Smith in Melbourne on Monday, while Kylie was launching her new album in Ibiza.

Kylie wrote on Twitter: “Congratulations to my little Sister, @danniiminogue and @krissmith13 on their beautiful baby boy, Ethan. He is gorgeous!!!”

The singer is expected to fly to Australia to see Ethan, her sister’s first baby, in the near future.

A spokesman for Dannii said the X Factor judge and her partner, Kris Smith, are ‘thrilled’ with the new arrival.

Dannii had been forced to miss the recent X Factor auditions, because they coincided with the later stages of her pregnancy. Stand-ins have including Spice Girl Geri Halliwell and Pussycat Doll Nicole Scherzinger.

Shortly before giving birth, Dannii tweeted she was pining to see The X Factor judges, saying: “Looking forward to catching up on X Factor auditions.

“Can’t wait to see Simon, Cheryl and Louis again soon – miss them very much. Dx.”