Mila Kunis and Ashton Kutcher are tying the knot!

Kutcher, 36, was spotted on Thursday with a huge diamond ring on her left hand, sparking the news of their engagement.  Kutcher and Kunis is have been dating since November 2012, but have known each other for more than 15 years.  The couple both starred on the hit sitcom "That 70s Show," where Kutcher gave a then 15-year-old Kunis her first kiss.

The newly engaged couple has not officially confirmed the happy news, but you can see a photo of Kunis' huge sparkler here.  With news of an engagement come reports the couple is ready to start a family, but Hollywood Life reports the Kunis and Kutcher aren't in a rush to have a baby of their own any time soon.

"There are two main reasons for this," a source explained to the gossip site, "One being the fact that she is in the best part of her career and wants to work a little longer on those goals and dreams and then move onto family and she also has been named the new face of Jim Beam so she will be meant to attend events and drink which is obviously a no no in the pregnancy department."

However, OK! magazine reported back in January Kunis was preparing her body for a baby, gaining weight and taking prenatal vitamins to speed along the process. 

"Mila and Ashton have been trying for a baby for months" a source told OK! magazine. "She's gained 10 pounds and is taking pregnancy vitamins. The buzz is that she is looking like she could be carrying a baby. Lately, you can't even wipe the grin off Ashton's face! The atmosphere around them is just electric."

It will be the second marriage for Kutcher and the first for Kunis.  Do you think the couple will make it down the isle?  Let us know in the comments section below.