2018–present: A Quiet Place film series and Jack Ryan
In 2018, Krasinski directed and co-wrote the film A Quiet Place, a post-apocalyptic horror thriller, in which he also co-starred with his wife Emily Blunt. Released by Paramount Pictures, it scored 96% at Rotten Tomatoes based on 367 reviews, and grossed over $340 million worldwide. The film's success led to Time magazine naming Krasinski one of the 100 most influential people in the world, and the creation of the A Quiet Place film series.
Krasinski produces and stars as the title character in the television series Jack Ryan, making him the fifth actor to portray the character after Alec Baldwin, Harrison Ford, Ben Affleck and Chris Pine from the film series. Jack Ryan premiered on Amazon Video on August 31, 2018. Four months before the series premiere, the series was renewed for a second season, after the critical and commercial success of A Quiet Place.
In March 2020, Krasinski started a web series titled Some Good News (SGN) on YouTube as a response to the ongoing COVID-19 pandemic. The series focused on highlighting good news at the time, while featuring celebrities including Steve Carell, Robert De Niro, the entire original Broadway cast of Hamilton, Brad Pitt, Samuel L. Jackson, Oprah Winfrey, Emma Stone, Ryan Reynolds, Steven Spielberg, Jon Stewart, Malala Yousafzai and the cast of The Office. On April 17, 2020, Krasinski hosted a livestream virtual prom for high schoolers whose proms were cancelled due to the pandemic; 210,000 viewers tuned into the event, which included live performances from Billie Eilish, Finneas, the Jonas Brothers, and DJ D-Nice. Krasinski became ordained as a minister in the Commonwealth of Massachusetts to officiate a virtual wedding as part of the series. The nine-episode series attracted 72 million views and 2.58 million subscribers. On May 22, 2020, ViacomCBS announced they had acquired the show to air on CBS All Access, but Krasinski later confirmed that he and ViacomCBS did not move forward with development plans for the company's streaming platform. Instead, Krasinski would keep Some Good News in its original format on YouTube and secondary video platforms established in the show's original run, such as Snapchat.
On January 20, 2021, Krasinski spoke at President Joe Biden and Vice President Kamala Harris's inauguration celebration via a remote address from his home office. Krasinski hosted his first episode of Saturday Night Live later that month, which was watched by 6.69 million viewers and received positively by critics.
Krasinski directed and wrote the sequel A Quiet Place Part II, in which he also had a supporting role. Initially scheduled for March 20, 2020, it was delayed due to COVID-19 (theatres began to shut down the week of March 16). It was eventually released on May 28, 2021, to positive reviews, becoming a box office success, and the first film of the pandemic era to cross $100 million at the domestic box office. On Rotten Tomatoes, the sequel earned a 91% rating based on 355 reviews, with the website's consensus stating that the "nerve-wracking" film expanded "the terrifying world of the franchise without losing track of its heart".
In May 2021, Krasinski's production company, Sunday Night Productions, signed a first-look deal with Paramount Pictures. In August of the same year, Krasinski had a cameo appearance as a silhouetted gamer in the film Free Guy.
In May 2022, Krasinski made his Marvel Cinematic Universe debut as Reed Richards / Mister Fantastic in Doctor Strange in the Multiverse of Madness as a member of the Illuminati after many years worth of fan casting, and interest from Krasinski himself.
In June 2022, he voiced Superman in animated film DC League of Super-Pets.
In October 2019, Krasinski's fantasy comedy IF was acquired by Paramount Pictures. Krasinski wrote, directed, produced, and co-starred in the film alongside Ryan Reynolds, who also served as producer. The cast includes Phoebe Waller-Bridge, Fiona Shaw, Louis Gossett Jr., and Krasinski's The Office co-star Steve Carell. The film was released on May 24, 2024.