Sofia Richie and Scott Disick have a huge age difference. But insiders say that's not stopping Richie for falling — and falling hard. 

"They are inseparable right now and not leaving each other's side. Scott is totally romancing her and she is under his spell," a source told E! "He took her away to Santa Barbara this weekend and is spoiling her with shopping trips and sweet gestures."

"He is taking care of her and that's exactly what she loves. Sofia has been interested in him for a long time," another source added. "She feels like she knows a different side of him and that they are good for each other. She is falling hard and thinks this is the real thing."

Some insiders say this is reminiscent of the way Richie fell hard for Justin Bieber, and they're concerned. Sources doubt Disick is looking for anything serious ... with anyone.

Mandy Moore And Taylor Goldsmith Are Engaged News of Mandy Moore and Taylor Goldsmith's engagement warmed the heart of every 'This Is Us' fan. And they aren't the only celebrity couple heating up. Katie Holmes and Jamie Foxx continue to spend time together, while insiders say Sofia Richie and Scott Disick are hooking up.

On a positive note, Mandy Moore has found her real-life Jack Pearson. The This Is Us star got engaged to Taylor Goldsmith last week! Meanwhile, Katie Holmes and Jamie Foxx continued to heat up, making fans wonder if an engagement could be in the cards for them, as well.

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Celeb moms are beaming too. Serena Williams debuted her new daughter. And Beyoncé was glowing at Rihanna's Dream Ball, Queen Bey's first major appearance since giving birth to twins in June.

Beyonce And Jay Z Beyonce looked stunning in he first public appearance since giving birth.

Of course, it wasn't all good news in Hollywood. Fergie, Rachel Bilson and Billy Bush are all separating from their long-time spouses.

But let's focus on the positive! Here's the scoop on the latest celeb couples:

1. Mandy Moore and Taylor Goldsmith

Mandy Moore and Taylor Goldsmith Mandy Moore has found love again with Taylor Goldsmith (Photo: Splash News).

Mandy Moore had been unlucky in love in the past. After marrying Ryan Adams, the couple split up in 2015.

But Moore moved on just months later with Goldsmith, leader of the rock band Dawes. Her co-stars confirmed the news of her engagement last week, and it didn't take long for Moore to show off her ring! Goldsmith, meanwhile, is just happy the proposal went smoothly.

"He was petrified," a source told Marc Malkin. "Mandy said yes and is so happy."

VERDICT: Totally Smitten

2. Katie Holmes and Jamie Foxx

Katie Holmes Katie Holmes is starting to step out in public with Jamie Foxx (Photo: Splash News).

After trying for years to keep their relationship private, Katie Holmes and Jamie Foxx have started to slowly go public with their romance. Earlier this month, they were photographed holding hands on the Malibu beach.

"They wanted to get to know each other and see where things were headed so it could develop in private before they went public," a source told Us Weekly. "But it’s very serious."

WHY JAMIE FOXX MAY NOT BE READY FOR MARRIAGE ...

Still, neither star is in any rush to get married. After all, they both have kids from prior relationships, and Holmes has already been through a messy divorce with Tom Cruise. So they will just continue to tease us with their romance.

"Jamie is very fond of Katie," a source told People. "They are both very happy."

VERDICT: Loving Life 

3. Sofia Richie and Scott Disick 

Scott Disick And Sofia Richie Scott Disick and Sofia Richie continue to hang out, though Richie has said in the past that they are just friends (Photo: Picture Perfect / Splash News).

Sofia Richie and Scott Disick have hung out multiple times over the past few months, sparking relationship reports. They got cozy on a yacht in Cannes back in May and then grabbed dinner together in Malibu the following month. Still, Richie maintained that they were just friends.

But last week, they were pictured grabbing coffee in Calabasas. And now insiders say they are likely hooking up after all. "Things became official over the past week while they were in New York City together," a source told Us Weekly.

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But it's hard to believe this relationship is going to get serious. They have a 15-year age difference. And Disick doesn't exactly have the best track record.

VERDICT: Headed For Heartbreak

Which couples do you think will last? Let us know your take in the comments section below!