Will Arnett is currently in a relationship with Alessandra Brawn, a socialite and businesswoman. They began dating in 2019 and have one son together, Alexander "Denny" Denison Arnett, born in 2020. Alessandra Brawn also has a son from a previous marriage, and together they co-parent their children along with Arnett's two sons from his previous marriage

. Previously, Will Arnett was married twice:

• His first marriage was to actress Penelope Ann Miller from late 1994 to early 1995.
• His second marriage was to comedian and actress Amy Poehler. They married in 2003, had two sons together, and separated in 2012. Their divorce was finalized in 2016. Despite their separation, Arnett and Poehler continue to co-parent amicably and maintain a close relationship for the sake of their children

In summary, Will Arnett is not currently married but is in a committed relationship with Alessandra Brawn.