The pair, who wed in July, cut stylish figures as they were smartly dressed in black for the Ralph Lauren Spring 2023 Fashion Experience event in San Marino, California, on Thursday (October 13).
Actress and singer Lopez, 53, stepped out in a black low-cut pin-striped dress with a black cowboy hat and black Christian Louboutin heels.
Oscar-winner Affleck looked dapper in a charcoal-black wool jacket with trousers and a black dress shirt, which he paired with smart leather shoes.
The newlyweds looked like they were still in honeymoon mode as they posed together, all smiles, with hands interlocked, occasionally staring lovingly at each other.
After posing for snaps, the pair headed inside to see the exclusive runway show that showcased Ralph Lauren’s Spring/Summer 2023 ready-to-wear collection.
The pair rubbed shoulders with the likes of Jessica Chastain, Diane Keaton, Sylvester Stallone and his wife, Jennifer Flavin.
It was the first official showbiz event for Lopez and Affleck since their July nuptials in an informal ceremony at the famous A Little White Wedding Chapel in Las Vegas.
The romantic history between the pair is infamous.
They were first engaged almost 20 years ago and called off their 2003 Santa Barbara nuptials (with 400 guests) days before the ceremony.
They reunited in 2021.
Affleck has three children - daughters Violet, 16, Seraphina, 13, and son Samuel, 10 - from his decade-long marriage to Jennifer Garner, which ended in 2018.
Lopez has 14-year-old twins, daughter Emme Maribel Muñiz and son Maximilian David Muñiz, from her third marriage to Marc Anthony, which ended in 2011 after seven years.