Oscar-winning couple Charlize Theron and Sean Penn have a lot on their agenda during their time in her native South Africa this summer: Shoot new drama The Last Face (he's directing, she's starring); get married; adopt a child together. "They want to get married very soon," a source tells Us Weekly of the couple's wedding plans. Theron, 38, "always intended to have another child," a Penn confidant adds of the actress, already mom to adopted son Jackson, 2.

53-year-old Penn, meanwhile, is already dad to Dylan, 23, and Hopper, 20, with ex-wife Robin Wright. "Sean is revitalized with Charlize," the source says of Penn, who began dating Theron about eight months ago after 18 years of friendship. (It would be the third marriage for Penn, who famously wed Madonna in the late 1980s, and the first for Theron, who split from longtime partner Stuart Townsend in 2010.)

For much more on the pair's fast-track plans for a wedding and a baby—and how Penn has become a "strong role model" for little Jackson—watch this week's Hot Stuff video as explained by Us Weekly's Entertainment Director Ian Drew and Beauty Director Gwen Flamberg.

Also in the roundup: Kendra Wilkinson is "leaning toward divorce" in the bitter aftermath of husband Hank Baskett's affair with a transgender model; details on Jessica Simpson's honeymoon, and more! Watch the Hot Stuff video now!