Great news for Justin Timberlake and Jessica Biel, who are back on and talking marriage. The pair have been back together since the Summer and have been on a string of dates around the States, most recently at a GQ party last week where they were “in a serious PDA session... kissing, hugging and canoodling.” Jess dumped Justin in March because of his “refusal to commit,” and apparently its Justin’s mum who’s been plying the pressure for him to get her back. “His mom was begging him to try to win her back,” a source revealed. Justin’s obviously been following his mum’s advice, as the source added, “Justin promised Jessica that within six months, he’ll give her an engagement ring. He’s finally ready to bite the bullet and become a one-woman guy.” The Sexy Back singer recently revealed Jess is “still the most significant person in my life.” So sweet!