According to the birth certificate, which was shared by TMZ on Friday, Stoker officially gave birth to the couple’s twins on February 19.
Jenner – whose parents are Caitlyn Jenner and Linda Thompson – already shares a four-year-old daughter Eva with his ex-wife Leah Felder, who he officially divorced in 2019.
When Brandon and his bride learned they were pregnant with twins, they insisted on waiting to learn the gender until after they were born.
They announced their pregnancy in August when Cayley was already 12 weeks along.
The couple, who began dating in March of 2019, wed just last month during a private courthouse ceremony in Santa Barbara.
‘We wed at the Santa Barbara Courthouse on Jan. 21 with my daughter Eva and Cayley’s grandmother, Joan, as our witness,’ Jenner told People magazine.
The 38-year-old finally let the public in on the wedding, when he made a birthday post to Cayley referring to her as his ‘beautiful wife.’
The post also featured a a slideshow of pictures with one photograph directly taken from the couple’s wedding. The pair can be seen embracing one another in their wedding garb.
Weeks prior, Jenner treated his baby mama to an intimate baby shower, which was attended by his father Caitlyn Jenner and Caitlyn’s closest pal Sophia Hutchins.
‘I feel like the luckiest man alive,’ toted Brandon on Instagram.
In the photo from the shower, Cayley can been sitting on her husband’s knee with her bump on full display in a floral patterned maxi dress.
Jenner already shares a four-year-old daughter Eva with his ex-wife Leah Felder, who he officially divorced in 2019.
During an August interview with People magazine, Brandon revealed how he went about explaining the impending birth of his twins to then three-year-old Eva.
‘Leah, Cayley and I sat down with her and told her what was happening, and she was very excited and happy. She’s super excited to be a big sister,’ said Jenner.
In 2018, the Brand and his ex took to Instagram to confirm their split to fans, family, and followers.
‘Even though we have chosen to separate as a couple, we still love one another very, very much and remain a major part of each others lives — as best friends, family and loving parents to our daughter,’ wrote Brandon of his separation from Felder.
Their relationship spanned a total of 14 years, having met in middle school and bonded over their mutual love of music, according to Extra.
The divorce became final last summer, nearly a year after their social media announcement.
Felder and Jenner share, both, legal and physical custody of daughter Eva.
Brandon is son to Caitlyn Jenner and songwriter Linda Thompson, who was married to Caitlyn from 1981-1986.
With the addition of Brandon and Cayley’s tiny twins, Caitlyn now has a total of 18 grandchildren between all nine of her children.
This total includes the offspring birthed by his stepchildren Kim, Kourtney, Khloe, and Rob Kardashian over the years.