In American English , we use many expressions to describe when two people have a lot of similarities or are very close . Here are some examples . If we say two people are joined at the hip , they are nearly always together . If we describe individuals as thick as thieves , it means they are very close . People considered two peas in a pod have many things in common . And we use the term kindred spirits to describe people who often share the same opinions and interests . These expressions can represent people who grew closer for different reasons . Maybe they complemented each other well in certain ways . Or maybe their situations brought them together for the purpose of completing something important or meaningful . But today we are going to discuss a very special kind of relationship – one that involves two people who are romantically involved and very successful . People in such relationships can be described as power couples . There are many examples of famous power couples , including successful movie stars , musicians and others in the performing arts . But power couples can exist in many other industries and communities , as well . And , the two people do not have to work in the same industry . If they do , however , that can make them even more powerful . For example , a well-known architect who builds homes could be partnered with a famous designer who decorates them . Or , one person in a power couple may be a music producer , while the other is a famous singer . Even though power couples involve highly successful people , one person could describe their partner as their better half . This is a way to compliment their “other half ” in the relationship . For example , one might say during a meeting with a friend , “Hello ! How are you ? And more importantly , how is your better half ?” Now , let's hear two friends use some of these expressions . Hey , I'm not used to seeing you alone . Where's your sidekick ? Who are you talking about ? You guys have been joined at the hip for weeks . Looks like you're thick as thieves . Well , the project is pretty important for the company . So , we're putting in a lot of hours . Are you becoming kindred spirits from working so much together ? It's just keeping us both very busy . Busy trying to become the new power couple in the office ? What are you talking about ?? We're not thick as thieves or kindred spirits , and we're definitely not a power couple . We are just working hard on the same project !