Working Title Films, which produced the hit movie, has optioned rights to Bridget Jones: The Edge of Reason, Helen Fielding's follow-up to her runaway bestseller, and is negotiating a deal for her to write the screenplay.
Diary opened at No. 3 in the U.S. with $10.7 million from only 1,611 screens but debuted at the top of the heap in Britain with $10 million — making it the biggest opening ever for a British film.
The production company's co-chairman Eric Fellner tells Variety the sequel isn't a certainty, "but when you get numbers like this, you've got the think about it."
Whether Renee Zellweger would reprise her role as the self-improvement-obsessed heroine is a subject of debate.
The actress has said she wouldn't like to put on the weight again but is thought not to have completely ruled out starring in a sequel.
Hugh Grant, who stars in Diary as Bridget's caddish boss, is unlikely to appear in the sequel simply because his character is not in The Edge of Reason.
Meanwhile, Fielding tells The Post she's just started work on a new novel, "but it's not a Bridget Jones book."
"It's a funny book set in Los Angeles and England, but I haven't got my protagonist yet," she says.
"I'm not saying I would never go back to Bridget again, but I would have to have a good idea. I would not just do another book for the sake of it.
"I find that subjects find you rather than the other way around."