The 'Shameless' star - who has played Phillip 'Lip' Gallagher in the critically-acclaimed US sitcom since 2011 - has finally popped the question after 11 years with the 27-year-old actress.
On Sunday (14.04.19), Addison shard a professional snap with her fiancé out on a bike ride and showed off her huge engagement ring.
She simply captioned the Instagram post: ''Mom & Dad.''
No further details about how Jeremy proposed are known at this time.
The couple welcomed their first child together, a daughter named Ezer Billie White, in October, and Jeremy recently admitted he's been learning how to parent from Addison because she's adjusted ''a lot faster'' to their new life.
He said: ''I'm learning from Addison because I think for moms, for women who have children, they click into it a lot faster than we do. So while I think I'm doing a really good job, I still look to her, because she, as soon as we started this thing, she's been incredible.''
Jeremy, 28, announced the birth of his tot on Instagram in late October, when he posted a picture of their new addition to the family laying on his and his partner in a hospital bed on Instagram.
He wrote alongside the snap: ''Ezer Billie White 10.20.2018 Welcome to the world baby girl, it just got so much brighter. (sic)''
The couple announced they were expecting their first child in a sweet post on the photo-sharing app in June.
At the time, Addison, 27, wrote: ''We made a baby and my heart is bursting at the seams.
''Today is my birthday but my wish already came true. This is 27 and the best is yet to come.''
The pair have documented their journey to parenthood on Instagram and, before Billie's birth, Addison revealed that Dakota Johnson will be their little girl's godmother.
Sharing a picture of her with the actress at a bowling alley to celebrate the 'Fifty Shades Freed' star's birthday, in which the latter placed a bowling ball in front of her stomach to match her pal's baby bump, Addison wrote: ''Happy birthday to my baby's godmother (sic).''
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