Jon Lovitz, 58, and Jessica Lowndes, 27, Spark Relationship Rumors With Romantic New Pics

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

Jessica Lowndes has been Instagramming all weekend about her new mystery man -- but is it Jon Lovitz?

The 58-year-old comedian tweeted out a photo of himself and the 27-year-old 90210 star riding in a Bentley convertible on Sunday. "Easter with my bunny, @jessicalowndes!!! ♥️♥️♥️," he captioned the pic. Lowndes also shared a selfie in the same car, writing: "His... ❤️.

WATCH: Sarah Paulson Says She's 'Absolutely' in Love With Holland Taylor, Talks Dating Older Women

In January, Lowndes and Lovitz were spotted in Honolulu taking photos of one another after they both guest starred in Hawaii Five-O together. "Who needs a selfie stick when your co-star is Jon Lovitz?" she   Instagrammed at the time. "Throwback to one of the funniest and most random paparazzi moments ??? #comedy #hawaii50 #tbt."

This most recent photo posted by Lovitz comes just a few days after Lowndes shared a pic of a man's hand between her legs. "There's a new man in my life," she wrote. "His hands are wise and tell a thousand stories... #smitten #hatersgonnahate."

WATCH: Steven Tyler, 67, Steps Out Holding Hands With 28-Year-Old Aimee Ann Preston

Further alluding that she was dating an older man (Lovitz is 33 years her senior), she quoted the Thai proverb, "Old cows love to eat young grass."

She added, "And I love me some old cows... ?"

WATCH: Henry Cavill Says His 19-Year-Old Girlfriend Is Mature for Her Age

She went on to post a pic from an ice cream date, with the message: "You say sugar daddy but I say ice cream daddy! Lol ??? #SweptoffMyFeet #ExtraSprinklesPleaseDaddy."

Lowndes also Instagrammed a video of herself in bed that she says was shot by her new guy. "When bae films you waking up in the morning... ?❤️? #TooOldToUseHashtags #MrBig," she wrote.

WATCH: Allison Janney, 56, Shows Off Hunky 36-Year-Old Boyfriend at Sundance

Whoever the actress is dating, it appears to be serious. "No, I haven't been hacked. I'm just really excited to be able to finally share this secret with you guys," Lowndes said in a video clip on Friday before sharing a close-up image of a huge diamond ring.

ET has reached out to both Lowndes and Lovitz for comment on the pics.

EXCLUSIVE: Demi Lovato Reveals Wilmer Valderrama Had 'Some Hesitations' About Their Age Difference