Somewhere, steam is pouring out of Ron Weasley's ears. On Monday night in London, Emma Watson, 17, who plays smart and sensible Hermione Granger in the "Harry Potter" flicks, mixed and mingled at a Vanity Fair party with Johnny Borrell, 27, the Razorlight front man best known for his romance last year with the reportedly rehabbing Kirsten Dunst. "She seemed really happy," a source tells the London Sun of the starlet (this, despite the fact that the rocker was kitted out in Mr. Rogers' favorite cardigan). "She's a Razorlight fan and was starstruck." And while People says Watson was shooting Borrell "adoring" looks, it appears things never got beyond the fangirl stage. "They were hanging out," a pal downplays to the mag. "Emma has had a boyfriend [rugby player Tom Duckworth] for years." The two reportedly went their separate ways before the end of the night, with the musician later spotted whooping it up at the tony Dorchester Hotel. "She has never met him before," assures the insider. "She has not spoken to him since and will likely not speak to him again."

Nicole and Joel at the Clive Davis pre-Grammy party

"She's a wonderful mother and she looks really hot already." That's Joel Madden, praising the postpartum allure of girlfriend Nicole Richie, who delivered daughter Harlow a month ago (via People). The couple took a break from diaper duty over the weekend to hit several Grammy shindigs, where Nicole happily showed off her slim figure and overflowing cleavage. "The girl is gifted, man," continues the enamored Madden. "Women hate her because she looks good being pregnant and then has the baby and looks sexy. There's something so attractive about her now. It's a motherly glow."

Such seeming domestic bliss isn't currently in the cards for Joel's twin brother, Benji, who has ended his engagement to Australian actress Sophie Monk. "Sophie and Benji have officially split," Monk's mouthpiece informs Australia's Daily Telegraph. "The decision was mutual and they remain amicable." The couple, who reportedly hit it off during a Good Charlotte video shoot in 2006, became engaged a little over a year ago.

Jeffrey Dean Morgan and Mary Louise Parker at Los Angeles premiere of "P.S. I Love You"

Love was apparently sweeter the second time around for Mary-Louise Parker. The New York Daily News reports the "Weeds" star just got engaged to actor Jeffrey Dean Morgan, who played lovable but doomed Denny Duquette on "Grey's Anatomy" (he's also appeared as her husband on the Showtime series). The adorable duo briefly split last year, a breather the actor blamed on it being the "wrong time in both our lives." But he told Parade in January that they soon realized "we were much better 'on' than 'off.'" "She's the most incredible woman I've ever known. I couldn't be happier," he swooned, adding that Parker's kids -- she is mom to 3-year-old William (dad is ex Billy Crudup, who shouldn't hold his breath for a wedding invite) and baby daughter Caroline, whom she adopted from Africa last fall -- consider him "a walking, live-in jungle gym."

Despite rumors to the contrary, Jamie Lynn Spears is still spending quality time with knocker-upper Casey Aldridge. The dewy pair was seen locking lips and walking hand-in-hand as they ran errands in Kentwood, La., last weekend, which included a stop at an always-glamorous AutoZone outpost. "They're adorable," a mole spouts to OK!. "They were so affectionate, constantly kissing one another. Casey is very much a gentleman -- he even opens her car door. He is so attentive to her every need." The "Zoey 101" starlet, 16, who is rumored to be about five months along, made sure to keep her swelling belly hidden, alternately styling an oversized sweatshirt and a maternity-clashing Heineken T-shirt.

For Josh Kelley, becoming Mr. Katherine Heigl has been a transformative experience. "It's feels unbelievable to be married. I thought that [being married] wasn't that different [from dating], but actually it is so different," the musician enthuses to People. "My mentality changed from being a boyish man to a man's man." Part of that growing up process appears to include having his problem areas pointed out by his wife of little over a month, who stepped out this week sporting an unfortunate chin-length mom 'do. "When we first met, I could tell that my ADD would definitely frustrate her a little bit," admits Kelley. "It's like, I would be drawing on paper tablecloths when I should have been engaging in conversation -- little things like that. No one ever told me that before. Nobody ever cared. But she does. And I like that."

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