"Here we are at 25 & 27. Today you're 40," Nicole Richie captioned a throwback photo of the couple
Forty is the new 20!
In the pic, the then-brunette designer, now 37, cuddled up to the Good Charlotte rocker as she snapped a selfie.
“Here we are at 25 & 27. Today you’re 40. Happy Birthday to my P.I.C., my ride or die, & my best friend for life @joelmadden,” she captioned the photo with three black heart emojis.
Richie also wished Madden’s identical twin brother, Benji (married to Cameron Diaz), a happy birthday in her Instagram stories, sharing a suave monochrome photo of the brothers, followed by an adorable snapshot of the “Lifestyles of the Rich & Famous” singers as children wearing tuxedos.
Madden sent his own birthday wish out to Benji, sharing a photo of the two. “Happy Birthday to my partner and best friend @benjaminmadden,” he wrote.
“We’ve been to hell and back and landed on our feet because of you and our wives. All my better halves. I would not be a husband or father if you didn’t push me to be the better version of myself. You lead quiet and by example. I’m blessed to follow my brother.”
Benji soon replied in his own post. “My twin brother @joelmadden We left home with 50$ and a guitar. With No where else to turn we decided to go forward into the world and try to make something more of our lives than what others may have thought likely or possible. We made a deal that we’d never let anything come between us and we never broke that promise,” he wrote.
“You’re my best friend and I am grateful the universe decided to put us in this lifetime together. Watching you be the husband and father that you are makes me the most proud. Thanks for always having my back brother. Wouldn’t standing here today with out you- I know that, And I’m so glad I am. Happy 40th Birthday, let’s do 40 more and then some more after that!! I love you Man ❤️❤️❤️”
In 2016, Madden wished his wife a happy birthday with a sweet and silly photo on Instagram as well.
In the cute snap, the Good Charlotte rocker appears to be disinterested by Richie’s attempt at a smooch.
“Best Mom, Best Friend, Best Wife. Happy Birthday Nicole, you keep us all laughing…” he captioned the shot.
The celebrations include Benji and wife Diaz, as well. Ahead of the Charlie’s Angels actress’ 46th birthday last August, Diaz took a break from her low-key lifestyle for a celebratory dinner with Richie and Zoe Saldana in Los Angeles. The outing was a rare sighting of Diaz, who has been enjoying her quiet life with husband Benji.
A source previously told PEOPLE that Diaz and the rocker “are great” and “both very happy living the quiet life” after they wed in 2015.
“The quiet life she lives now with Benji, she wanted for a long time,” the source added.