Jessica Simpson ‘couldn’t be happier’ for her younger sister Ashlee Simpson

Jessica Simpson ‘couldn’t be happier’ for her sister Ashlee Simpson after she announced she is expecting her third child.

Ashlee took to social media on Thursday to reveal she and her husband Evan Ross are expecting their second child together after four-year-old daughter Jagger, which will be Ashlee’s third overall as she also has 11-year-old son Bronx with her ex-husband Pete Wentz.

And now, her older sister Jessica – who welcomed her third child, Birdie Mae, into the world 13 months ago – has said she’s ‘beyond elated’, and can’t wait to become an ‘auntie of three’.

Happy sis: Jessica Simpson ‘couldn’t be happier’ for her sister Ashlee Simpson after she announced she is expecting her third child. Seen in NYC in February

So close: Ashlee and Jessica in Venice Beach in 2015 with Eric Johnson in the background

So close: Ashlee and Jessica in Venice Beach in 2015 with Eric Johnson in the background

The 39-year-old singer – who also has Maxwell, eight, and Ace, six, with her husband Eric Johnson – commented on Ashlee’s Instagram post.

‘I couldn’t be happier for my favorite person on the planet!!! This family of 5 over here are beyond elated for YOU, Evan, BX, and Jagger to expand the beautiful gift of family. Auntie of 3!!! This is hands down the most exciting news I could possibly imagine!!!’ she said.

Ashlee revealed her pregnancy with a picture of herself and Evan holding up a positive pregnancy test.

So much love: 'I couldn't be happier for my favorite person on the planet!!! This family of 5 over here are beyond elated for YOU, Evan, BX, and Jagger to expand the beautiful gift of family. Auntie of 3!!! This is hands down the most exciting news I could possibly imagine!!!' she said

So much love: ‘I couldn’t be happier for my favorite person on the planet!!! This family of 5 over here are beyond elated for YOU, Evan, BX, and Jagger to expand the beautiful gift of family. Auntie of 3!!! This is hands down the most exciting news I could possibly imagine!!!’ she said

Joyous: Ashlee and her husband Evan Ross had some great news to share on Thursday. The couple revealed to their Instagram followers that she is pregnant with their second child; they already have daughter Jagger, aged four, and she has 11-year-old son Bronx from her relationship with Pete Wentz

Joyous: Ashlee and her husband Evan Ross had some great news to share on Thursday. The couple revealed to their Instagram followers that she is pregnant with their second child; they already have daughter Jagger, aged four, and she has 11-year-old son Bronx from her relationship with Pete Wentz

Charity minded: She added: 'During this unprecedented time, we know pregnant women may be under greater stress which is why we are supporting @marchofdimes Mom and Baby #COVID19 Intervention and Support Fund

Charity minded: She added: ‘During this unprecedented time, we know pregnant women may be under greater stress which is why we are supporting @marchofdimes Mom and Baby #COVID19 Intervention and Support Fund

In the caption, the 35-year-old singer also revealed she and her spouse are supporting charitable organisation March of Dimes and their Mom and Baby COVID19 Intervention and Support Fund to help provide relief for pregnant women during the ongoing coronavirus pandemic.

She wrote alongside the image: ‘We are pregnant and we are so excited to share it with everyone. Baby #3 Thank you @clearblue #clearbluepartner #clearblueconfirmed

‘During this unprecedented time, we know pregnant women may be under greater stress which is why we are supporting @marchofdimes Mom and Baby #COVID19 Intervention and Support Fund. 

With their child: Seen in 2018 with daughter Jagger at Disney On Ice Presents 'Dare To Dream' at Staples Center in Los Angeles

With their child: Seen in 2018 with daughter Jagger at Disney On Ice Presents ‘Dare To Dream’ at Staples Center in Los Angeles

‘Check out their Instagram page to see how they are helping moms and babies get the care they need now and in the future. (sic)’

And following the announcement, a source confirmed the couple have been wanting to expand their brood for ‘a long time’.

The insider said: ‘Ashlee has been wanting another baby for a long time. They always wanted a big family!’  

A source told People the couple very much wanted another child.

‘Ashlee has been wanting another baby for a long time. They always wanted a big family!’ a source told the site. 

Her older sister: Sibling Jessica has three children with Johnson; seen on Easter

Her older sister: Sibling Jessica has three children with Johnson; seen on Easter

Last week she shared a sweet Instagram snap of herself enjoying ‘QUARANTINE CUDDLES’ with her French bulldog Bama.

Earlier she had posted a heartwarming photo of Jagger.

The child was beaming as she wore a pair of bunny ears just days after Easter.

In February before the lockdowns began Ashlee used her Instagram to promote Jessica’s dishy new memoir Open Book.

Jess is self-isolation: The beauty in the swimming pool at her Hidden Hills estate

Jess is self-isolation: The beauty in the swimming pool at her Hidden Hills estate

When the autobiography hit the number one spot on the New York Times bestseller list Ashlee exuberantly congratulated her sister.

‘I am so very proud of my beautiful, brave, kind, loving sister!!!’ wrote Ashlee alongside a picture of the book cover. 

‘It’s beautiful to see you sharing your truth with the world. You are so inspiring. I love you so much. You are a #1 best selling author.’