Public displays of affection from Ashton Kutcher and Mila Kunis, Ryan Reynolds and Blake Lively

It's a September full of smooches between Hollywood stars.

Though they haven't confirmed news of their relationship, Ashton Kutcher and Mila Kunis have been caught showing some public displays of affection toward each other, most recently in the Big Apple, according to E! News. The couple recently strolled in Central Park and locked lips in a cozy spot. (Watch the video above.)

The couple starred in "That 70s Show" as high school sweethearts Michael and Jackie from 1998 to 2006.

This isn't the first time the couple have been caught kissing in public. It seems this romance has been going on for some time. So why not admit it, already?

Kutcher was previously married to Demi Moore, who is reportedly "heartbroken" over the relationship, according to The Huffington Post.

Do you think this on-screen couple makes a good real-life duo?

In other PDA news ...

Check out newlyweds Ryan Reynolds and Blake Lively locking lips in the above E! video (and check out that wedding ring, while you're at it!). The couple married earlier this month in a private ceremony in South Carolina.

Actress Anne Hathaway and Adam Shulman kissed while waiting for a traffic light to change in Los Angeles. Read more at Pop Sugar.

And, finally, Miley Cyrus and Liam Hemsworth weren't afraid to get up close and personal while out to dinner with friends Saturday night at Mercado di Vetro in Los Angeles, reported People.com.

"They were very affectionate with each other all night," an onlooker told People.

Cyrus announced her engagement to Hemsworth back in June. (Photo: Kevin Winter/Getty Images for AIF)

What do you think of the Cyrus's engagement?

More headlines:
-- Donald Trump on Kate Middleton topless photos: 'Only herself to blame' (Entertainment Weekly)
-- Ryan Lochte responds to 'SNL' impression: 'That was a pretty harsh one' (Entertainment Weekly)
-- Reese Witherspoon selling her ranch for $10 million (People.com)
-- Shaun White charged with public intox, vandalism (AP)
-- Britney Spears throws birthday blowout for sons Sean and Jayden (E! Online)