Big Daddy 2: Sonny Days (2026) is a heartfelt, comedic sequel that catches up with Sonny Koufax (Adam Sandler) and his once-adopted-now-fully-grown son, Julian “Frankenstein” McGrath (Cole Sprouse), more than two decades after the unlikely family first formed. It’s a story about growing up, letting go, and realizing that fatherhood doesn’t end when your kid turns eighteen—it just changes shape.
The film opens with Sonny enjoying middle-aged comfort: a steady relationship with Layla, a modest law practice he somehow stumbled into running, and a knack for avoiding responsibility whenever possible. Julian, now in his mid-20s, is ambitious, charming, and ready to marry his college sweetheart, Emily. When Julian asks Sonny to be his best man, Sonny sees it as the perfect chance to prove he’s still the “cool dad” who raised him with a mix of street smarts, chaos, and love.
But Sonny’s plans for an easy wedding season spiral out of control when Emily’s wealthy, hyper-traditional parents clash with Sonny’s laid-back style. A series of mishaps—including a disastrous engagement party, a bachelor trip gone sideways, and an ill-advised karaoke night—forces Sonny and Julian to confront their differences. For the first time, Julian starts to question whether Sonny’s unconventional parenting prepared him for adulthood, while Sonny wonders if he’s being left behind.
The comedic core is balanced by emotional beats as Sonny realizes his role in Julian’s life is shifting from daily protector to lifelong supporter. Along the way, old friends from the first film make appearances, including a now-retired delivery guy, the twins Julian once called “Frankenstein,” and Sonny’s slacker crew—still ready to give bad advice at a moment’s notice.
In the heartwarming climax, Sonny redeems himself by pulling off a wildly improvised, perfectly imperfect wedding when last-minute disasters threaten to ruin the day. It’s messy, funny, and full of heart—exactly what Julian needed, and exactly what makes Sonny Sonny.
Big Daddy 2: Sonny Days blends the goofy, irreverent humor of the original with a more reflective look at growing older, redefining family, and finding joy in life’s unscripted moments. It’s proof that you never really stop being a dad—you just trade diaper duty for life advice and the occasional wildly inappropriate toast.