Rihanna leads tributes to Beyoncé after her pregnancy announcement.

The 35-year-old singer took to Instagram on Wednesday (01.02.17) to announce she is expecting twins with her husband and rapper Jay Z - with whom she already shares five-year-old Blue Ivy - and celebrity friends of the pair have flocked to social media to show their support.

Reposting the picture of the 'Formation' hitmaker which she used to break the news, 28-year-old Rihanna wrote on Instagram: ''so excited about this news!!!! Congratulations to you @Beyonce and my big brother Jay!!!! (sic)''

Meanwhile model Hailey Baldwin surprised fans by claiming she was ''more excited'' for the arrival of the twins than she is likely to be for her own future children.

She posted on Twitter: ''I feel like I'm more excited for Beyoncé to be pregnant than I will be for my own child.''

Chrissy Teigen - who is a close friend of the 'Halo' singer - also took to Twitter to show her support.

She wrote: ''But really. Congrats to my best friend Beyonce I love you so much. Hive forever. (sic)''

Actress Bryce Dallas Howard said: ''I think we all really needed this. #twins #wcw @Beyonce (sic)''

Whilst Laverne Cox added: ''Congratulations to @Beyonce and the entire Knowles Carter family (sic)''

Beyoncé shared her special news with her Instagram followers when she posted a photo of herself showcasing her growing baby bump, and told her fans she was expecting two new additions to her family.

She wrote: ''We would like to share our love and happiness. We have been blessed two times over. We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes. - The Carters (sic)''