diff --git a/app/src/main/java/com/isolaatti/profile/domain/entity/UserProfile.kt b/app/src/main/java/com/isolaatti/profile/domain/entity/UserProfile.kt
index 6e97894..c04242a 100644
--- a/app/src/main/java/com/isolaatti/profile/domain/entity/UserProfile.kt
+++ b/app/src/main/java/com/isolaatti/profile/domain/entity/UserProfile.kt
@@ -14,7 +14,7 @@ data class UserProfile(
     val numberOfLikes: Int,
     val numberOfPosts: Int,
     val isUserItself: Boolean,
-    val followingThisUser: Boolean,
+    var followingThisUser: Boolean,
     val thisUserIsFollowingMe: Boolean,
     val profileImageId: String?,
     val descriptionText: String?,
diff --git a/app/src/main/java/com/isolaatti/profile/domain/use_case/FollowUser.kt b/app/src/main/java/com/isolaatti/profile/domain/use_case/FollowUser.kt
new file mode 100644
index 0000000..db3bb8e
--- /dev/null
+++ b/app/src/main/java/com/isolaatti/profile/domain/use_case/FollowUser.kt
@@ -0,0 +1,16 @@
+package com.isolaatti.profile.domain.use_case
+
+import com.isolaatti.followers.domain.FollowersRepository
+import com.isolaatti.utils.Resource
+import kotlinx.coroutines.flow.Flow
+import javax.inject.Inject
+
+class FollowUser @Inject constructor(private val followersRepository: FollowersRepository) {
+    operator fun invoke(userId: Int, follow: Boolean): Flow<Resource<Boolean>> {
+        return if(follow) {
+            followersRepository.followUser(userId)
+        } else {
+            followersRepository.unfollowUser(userId)
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/isolaatti/profile/presentation/ProfileViewModel.kt b/app/src/main/java/com/isolaatti/profile/presentation/ProfileViewModel.kt
index bc027b3..b054fa7 100644
--- a/app/src/main/java/com/isolaatti/profile/presentation/ProfileViewModel.kt
+++ b/app/src/main/java/com/isolaatti/profile/presentation/ProfileViewModel.kt
@@ -8,6 +8,7 @@ import com.isolaatti.images.common.domain.entity.Image
 import com.isolaatti.posting.posts.presentation.PostListingViewModelBase
 import com.isolaatti.posting.posts.presentation.UpdateEvent
 import com.isolaatti.profile.domain.entity.UserProfile
+import com.isolaatti.profile.domain.use_case.FollowUser
 import com.isolaatti.profile.domain.use_case.GetProfile
 import com.isolaatti.profile.domain.use_case.GetProfilePosts
 import com.isolaatti.profile.domain.use_case.SetProfileImage
@@ -24,7 +25,8 @@ import javax.inject.Inject
 class ProfileViewModel @Inject constructor(
     private val getProfileUseCase: GetProfile,
     private val getProfilePostsUseCase: GetProfilePosts,
-    private val setProfileImageUC: SetProfileImage
+    private val setProfileImageUC: SetProfileImage,
+    private val followUserUC: FollowUser
 ) : PostListingViewModelBase() {
     private val _profile = MutableLiveData<UserProfile>()
     val profile: LiveData<UserProfile> get() = _profile
@@ -35,6 +37,8 @@ class ProfileViewModel @Inject constructor(
 
     private val toRetry: MutableList<Runnable> = mutableListOf()
 
+    val followingLoading: MutableLiveData<Boolean> = MutableLiveData()
+
 
     // runs the lists of "Runnable" one by one and clears list. After this is executed,
     // caller should report as handled
@@ -60,14 +64,7 @@ class ProfileViewModel @Inject constructor(
                     is Resource.Success -> {
                         _profile.postValue(it.data!!)
                         followingState.postValue(
-                            it.data.let {user->
-                                when {
-                                    user.followingThisUser && user.thisUserIsFollowingMe -> FollowingState.MutuallyFollowing
-                                    user.followingThisUser -> FollowingState.FollowingThisUser
-                                    user.thisUserIsFollowingMe -> FollowingState.ThisUserIsFollowingMe
-                                    else -> FollowingState.NotMutuallyFollowing
-                                }
-                            }
+                            it.data.let { user-> getFollowingState(user.followingThisUser, user.thisUserIsFollowingMe) }
                         )
                     }
                 }
@@ -75,6 +72,15 @@ class ProfileViewModel @Inject constructor(
         }
     }
 
+    private fun getFollowingState(followingThisUser: Boolean, userIsFollowingMe: Boolean): FollowingState {
+        return when {
+            followingThisUser && userIsFollowingMe -> FollowingState.MutuallyFollowing
+            followingThisUser -> FollowingState.FollowingThisUser
+            userIsFollowingMe -> FollowingState.ThisUserIsFollowingMe
+            else -> FollowingState.NotMutuallyFollowing
+        }
+    }
+
     fun setProfileImage(image: Image) {
         viewModelScope.launch {
             setProfileImageUC(image).onEach {
@@ -83,6 +89,28 @@ class ProfileViewModel @Inject constructor(
         }
     }
 
+    fun followUser() {
+        val currentProfile = _profile.value ?: return
+        val following = currentProfile.followingThisUser
+        viewModelScope.launch {
+            followUserUC(profileId, !following).onEach {
+                when(it) {
+                    is Resource.Error -> {
+                        followingLoading.postValue(false)
+                    }
+                    is Resource.Loading -> {
+                        followingLoading.postValue(true)
+                    }
+                    is Resource.Success -> {
+                        followingLoading.postValue(false)
+                        _profile.postValue(currentProfile.apply { followingThisUser = !following })
+                        followingState.postValue(getFollowingState(!following, currentProfile.thisUserIsFollowingMe))
+                    }
+                }
+            }.flowOn(Dispatchers.IO).launchIn(this)
+        }
+    }
+
     override fun getFeed(refresh: Boolean) {
         viewModelScope.launch {
             if(refresh) {
diff --git a/app/src/main/java/com/isolaatti/profile/ui/ProfileMainFragment.kt b/app/src/main/java/com/isolaatti/profile/ui/ProfileMainFragment.kt
index 0c63b11..724b686 100644
--- a/app/src/main/java/com/isolaatti/profile/ui/ProfileMainFragment.kt
+++ b/app/src/main/java/com/isolaatti/profile/ui/ProfileMainFragment.kt
@@ -284,6 +284,11 @@ class ProfileMainFragment : Fragment() {
                 audioPlayerConnector.playPauseAudio(audio)
             }
         }
+
+        viewBinding.followButton.setOnClickListener {
+            it.isEnabled = false
+            viewModel.followUser()
+        }
     }
 
     private fun setObservers() {
@@ -300,6 +305,9 @@ class ProfileMainFragment : Fragment() {
         viewModel.errorLoading.observe(viewLifecycleOwner) {
             errorViewModel.error.postValue(it)
         }
+        viewModel.followingLoading.observe(viewLifecycleOwner) {
+            viewBinding.followButton.isEnabled = !it
+        }
     }
 
     private fun getData() {