Hollywood celebrities have said “sorry” for the social media posts they made before the Princess of Wales revealed she was undergoing chemotherapy treatment.

US Actress Blake Lively admitted to making a “silly” post that referenced “photoshop fails” on social media.

“I’m sorry. Sending love and well wished to all,” Ms Lively wrote.

World leaders including US President Joe Biden have also expressed their support for Princess Catherine as she undergoes treatment.

“Jill and I join millions around the world in praying for your full recovery,” Mr Biden posted on X.