Top Celebrity Splits of 2015

— -- intro: Maintaining a relationship is hard enough, but in Hollywood it becomes nearly impossible thanks to demanding work schedules, lots of travel and paparazzi constantly wanting to snap a photo of the happy couple.

Beloved couples such as Ben Affleck and Jennifer Garner along with Gwen Stefani and Gavin Rossdale sadly split this year. Not to mention the country music scene was rocked this year thanks to the divorce announcements of Miranda Lambert and Blake Shelton along with Reba McIntyre and Narvel Blackstock.

Find out more couples who won't be ringing in the New Year together.

quicklist: 1title: Kaley Cuoco and Ryan Sweetingtext: After 21 months of marriage, Kaley Cuoco and Ryan Sweeting called it quits in September.

"Kaley Cuoco and Ryan Sweeting have mutually decided to end their marriage," Cuoco's rep told People magazine at the time.

The actress, 30, and the tennis player, 28, married on New Year's Eve in 2013, months after they started dating.

Afterward, Cuoco found herself back at a tattoo parlor to cover up the Roman numerals 12-31-13 on her back, which represented the day she wed Sweeting. The "Big Bang Theory" actress turned the tattoo into a giant moth.

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quicklist: 2title: Jennifer Garner and Ben Affleck text: No one saw a divorce coming for Hollywood power couple, Jennifer Garner and Ben Affleck. The two announced they were divorcing after 10 years of marriage and three kids in June.

"After much thought and careful consideration, we have made the difficult decision to divorce," the couple said in a joint statement. "We go forward with love and friendship for one another and a commitment to co-parenting our children whose privacy we ask to be respected during this difficult time."

Despite splitting, Garner, 43, and Affleck,43, continue to live on the same property with their three children, a source told ABC News.

Affleck, 43, famously said he fell in love with Garner on set of their 2001 film, "Pearl Harbor."

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quicklist: 3title: Miranda Lambert and Blake Sheltontext: When Miranda Lambert and Blake Shelton announced they were set to divorce in July, country music fans couldn't believe the seemingly perfect couple were having trouble.

And based on a statement released not long after they announced plans to divorce, it appears the two couldn't believe things were ending either.

"This is not the future we envisioned," their reps told the AP. "And it is with heavy hearts that we move forward separately. We are real people, with real lives, with real families, friends and colleagues. Therefore, we kindly ask for privacy and compassion concerning this very personal matter."

The couple wed in 2011 in Texas after five years of dating. They celebrated their fourth wedding anniversary this past May.

This was the second divorce for Shelton. He divorced first wife, Kaynette Gern, in 2006.

It didn't take long for Shelton, 39, to move on. Months after the split, Shelton confirmed he was dating fellow "The Voice" coach, Gwen Stefani. Meanwhile, Lambert, 32, a Texas native, moved back to Nashville, where she got her start in 2003 on the reality competition "Nashville Star."

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quicklist: 4title: Gwen Stefani and Gavin Rossdaletext: Speaking of Gwen Stefani, the No Doubt front-woman split with her husband of 13 years, Gavin Rossdale, in August.

The couple, who have three sons together, said in a statement that they "remain partners in parenthood."

Stefani, 46, and Rossdale, 50, wed in 2002.

Months later, "The Voice" coach confirmed she was dating fellow coach, Blake Shelton, who had recently split with country music singer, Miranda Lambert.

"I am in a good place," said Stefani about her life post-divorce on "The Ellen DeGeneres Show" in November. "I'm having a lot of fun, It's like a whole new life, a whole new chapter."

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quicklist: 5title: Halle Berry and Olivier Martineztext: After two years of marriage, Halle Berry and Olivier Martinez announced in October that they had filed for divorce.

In a joint statement to ABC News, the actors, both 49, said that although they're splitting, they will remain committed to raising their 2-year-old son, Maceo. Berry also has a 7-year-old daughter, Nahla, from a previous relationship.

The Oscar winner and Martinez got engaged in March 2012, and later wed in France's Burgundy region in July 2013.

A month later, the "Extant" star told Extra that she was "doing OK" after the split. "I keep pushing and I'm really happy to be here because whenever you're going through anything in life, when you step outside yourself and focus on others, that's always the best remedy for any situation that you'd rather not be dealing with," she added.

It was Berry's third marriage.

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quicklist: 6title: Avril Lavigne and Chad Kroegertext: Singer Avril Lavigne revealed on Instagram that she was splitting from her second husband, Chad Kroeger, in September.

"It is with heavy heart that Chad and I announce our separation today," the 30-year-old singer wrote then. "Through not only the marriage, but the music as well, we've created many unforgettable moments. We are still, and forever will be, the best of friends, and will always care deeply for each other. To all our family, friends and fans, thank you sincerely for the support."

Lavigne,30 and Kroeger, 40, got married in July 2013 in the South of France.

2015 has been a difficult year for Lavigne, who opened up about her battle with Lyme disease on "Good Morning America" earlier this year.

"I believe that I will come out of this healthier and stronger than I was before," Lavigne said. "I've gained a lot of perspective on my life."

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quicklist: 7title: Megan Fox and Brian Austin Greentext: Megan Fox told Cosmopolitan magazine that she and Brian Austin Green "have done everything you can do to ruin a relationship," and their behavior ultimately led to Fox filing for divorce in August.

The "Ninja Turtles" actress married the former "90210" star in 2010 after six years of dating. A representative for the Superior Court of Los Angeles told ABC News their date of separation was listed as June 15.

Fox, 29, and Green, 42, have two children together, Noah, 3, and Bodhi, 1. Green also has a son named Kassius, 13, from a previous marriage.

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quicklist: 8title: Reba McIntyre and Narvel Blackstocktext: What seemed like an even bigger shock to country music was the August announcement by Reba McEntire and Narvel Blackstock that they were ending their 26-year marriage.

In a joint statement on the country queen's website, the two revealed that they have been separated for the past few months. The statement added that the two will continue to work together, however.

McEntire, 60, and Blackstock, 59, her manager, married in 1989. The next year, they welcomed a son, Shelby, who is now a race care driver. Blackstock also has children from a previous marriage, including son Brandon, who is married to Kelly Clarkson.

Together, McEntire and Blackstock own Starstruck Entertainment, a talent management group that represents the likes of Blake Shelton.

This was the second marriage for both.

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quicklist: 9title: Charlize Theron and Sean Penntext: Charlize Theron told Esquire magazine that she was "shocked" to find love with Sean Penn. Still, fans were even more shocked that the two actors called off their engagement in June.

Theron, 40, and Penn, 55, have known each other for about 20 years. Their friendship started when he was married to actress Robin Wright, and she was in a long-term relationship.

The two began dating in December 2013 and were engaged a year later.

It would've been the third marriage for Penn, who was previously married to Wright and Madonna.

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