As summer really heats up, Summerfest is underway in Milwaukee.

The two-week event began on June 27, with the likes of Imagine Dragons, Logic, Halsey, Lil Uzi Vert, Nelly, Tory Lanez, Rachel Platten, Alesso, Buddy Guy and Rick Springfield among the first-week performers.

The festival, which is one of the largest and longest-running music events in the world, is currently in its 51st year.

In addition to some of the aforementioned acts, week 1 saw live shows from Spoon, Belly, Kaleo, Party Favor, Capital Cities, Greta Van Fleet and more.

See photos from select week 1 performances below, by Dan DeSlover.