Biel recently dismissed reports of their marriage saying: "What's weird is, you're single for 20 or 30 years, and you're married for, like, 70. It doesn't seem like a good ratio, does it?"
But her words have not deterred Timberlake, who reportedly bought a promise ring in California to make their relationship more official, World Entertainment News Network reported. The couple has been dating since May.
A source tells Life & Style magazine: "Justin isn't ready to propose, but he wants to make a commitment to her. Justin says Jess is his dream girl. He wants to give her a symbol of his affection and love."