AceShowbiz - Millie Bobby Brown and Jake Bongiovi have taken on babysitting duties together. The "Stranger Things" star and the son of rocker Jon Bon Jovi looked somber when they were watching a little one in New York City.

On Wednesday, April 17, the 20-year-old actress and her 21-year-old fiance were spotted out and about in the Big Apple. In pictures and a video making their rounds online, it could be seen that they were joined by an unidentified young boy.

At one point, Millie and Jake took their time to enjoy some fresh air. The engaged couple was sitting down close next to each other on a bench while the boy was playing near them. The two looked downcast while showing stern facial expressions.

Millie, who was holding a cup of coffee in one of her hands, and Jake also appeared not in good spirits when they strolled around the city with no smiles on their faces. The two were photographed walking side-by-side as he pushed a stroller, on which the boy was sitting down.

On the sunny day, Millie opted to wear a casual and comfortable ensemble, consisting of a loose long-sleeved white tee and a pair of long light gray sweatpants, which came with black lines on their sides. She also put on a brown insulated jacket and a pair of matching boots. In addition, her long hair was let loose and parted in the middle.

As for Jake, the model went with a colorful outfit that seemingly made his body warm. He sported a green army hoodie over a black tee. He also wore a pair of electric blue jogger pants, a pair of high white socks and blue Louis Vuitton sneakers.

The babysitting duties come as Millie and Jake are preparing for their wedding. In April 2023, they announced that they have been engaged. She flashed her massive diamond ring as seen in a black-and-white Instagram photo and penned, "I've loved you three summers now, honey, I want 'em all." He also took to the social media platform to share the exciting news.