The recently engaged 30-year-old said she had several reasons to celebrate - her sister Ashlee's husband, nephew Bronx, two, Eric and her dog.
She tweeted: 'We are lucky to have 3 new studs in the fam: Pete, BX, and EJ!
'Oh and I can't forget Bentley!!!'
The family all stayed at Jessica's parents' house on Christmas Eve to celebrate the festive season.
And the star, who became engaged to Eric in November, said Johnson has made her holidays very special.
She added: 'Eric is the perfect addition to our family.'
Jessica wasn't the only Simpson to take to Twitter to spread some Christmas cheer, her little sister Ashlee, 26, did as well.
She wrote: 'Best day ever. I feel blessed to have so much joy, and amazing love in my life.'