Sibling rivalry can be fierce at the best of times, with brothers and sisters competing throughout their lives to be more successful than each other in any number of fields.

But for brothers and sisters in the entertainment industry, the competition may be even more aggressive, as siblings compete for notoriety, success and public favour as they battle to become the most famous.

The American Psychological Association defines sibling rivalry as ‘competition among siblings for the attention, approval, or affection of one or both parents or for other recognition or rewards, such as in sports or academics’.

But when public opinion is also at play, another element of competition is brought into the arena. And in almost every case, one sibling ends up being significantly more well-known than the other.

Just this week, Jamie Lynn Spears has come under fire as she enters the I’m a Celebrity jungle, claiming she’s best known for being an actress and singer – and making no mention of her superstar sister Britney Spears.

Britney fans were up in arms as her younger sibling discussed her modestly successful career, which included the lead role in Nickelodeon show Zoey 101, without noting that a whole cohort of people know of her by association as the younger sister of the pop sensation.

Here, FEMAIL looks at some of the siblings who work in the same industry, but haven’t quite reached the same dizzying heights as their very famous loved ones…

Jamie Lynn Spears – sister of Britney Spears

At the height of her fame in the late nineties and noughties, Britney Spears was one of the world’s biggest megastars.

As the details of the her life over the last two decades have unravelled – including the details of the restrictive conservationship under which she lived, her life seems less than appealing.

However, there may be one person who hankers over the positive aspects of Britney’s success – her younger sister Jamie Lynn Spears.

Jamie Lynn has enjoyed some success in both the acting and music worlds, playing Zoey Brooks on the Nickelodeon teen sitcom Zoey 101 (2005–2008). She has since reprised the role in sequel film Zoey 102 (2023).

Jamie also won the role of Noreen Fitzgibbons on Netflix romantic drama Sweet Magnolias (2020–present).

Jamie Lynn was the subject of media scrutiny in December 2008 when she announced her pregnancy at just 16-years-old, and following the birth of her baby, she stopped acting for five years.

She has also enjoyed some success in the world of music, with her debut single released in 2013, How Could I Want More, and her album Journey in 2014.

She is currently starring on ITV’s reality television show I’m a Celebrity…Get Me Out of Here!

However, despite this recognition, her career does not come success to the iconic portfolio of sister Britney – and more sadly, the siblings do not have a good relationship, thought to be largely due to issues around the conservatorship.