Aaaawww, here's a bit of lovely old news to brighten up this cold, wet Wednesday - Jack Osbourne and his fiancée Lisa Stelly have become parents for the first time.

The reality star and his actress partner welcomed 8lb 6oz daughter Pearl into the world last night - and proud new grandma Sharon was there to witness it!

Taking to Twitter to spread the news, she wrote: "Today I witnessed my first grandchild being born, life changing experience. She is an angel."

@MrsSOsbourne
Sharon Osbourne

Today I witnessed my first grandchild being born, life changing experience. She is an angel.

April 25, 2012 1:01 am via web Reply Retweet Favorite

Jack's sister Kelly also tool to Twitter to express her happiness at becoming an aunt "Thank you so much for your congratulations but they really should be going to @lisamarstelly & @mrjacko! I am one proud Auntie!"

@Rosie_Nixon
Rosie Nixon

HELLO! can exclusively announce the safe arrival of @MrJackO & @lisamarstelly 's baby girl Pearl weighing 8lb 6oz. Love & congrats to them!

April 24, 2012 10:12 pm via web Reply Retweet Favorite

She later added: "Today has been one of the most amazing days of my life!"

@MissKellyO
Kelly Osbourne

Today has been one of the most amazing days of my life!

April 25, 2012 7:07 am via web Reply Retweet Favorite

Before the birth, Sharon appeared on the Ellen DeGeneres Show and could barely contain her excitement at the impending birth.

"Like its Grandma, it's late. I'm always late and this baby is late... It could be (born) any second," she said. "I've got the kettle on. I've got towels. I've got everything ready."

Congrats to all!