diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/CallbackQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/CallbackQuery.kt
index c5b6685505..3ab043ed28 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/CallbackQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/CallbackQuery/CallbackQuery.kt
@@ -1,11 +1,11 @@
 package dev.inmo.tgbotapi.types.CallbackQuery
 
+import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.types.CallbackQueryIdentifier
 import dev.inmo.tgbotapi.types.User
 
-sealed interface CallbackQuery {
+sealed interface CallbackQuery : FromUser {
     val id: CallbackQueryIdentifier
-    val user: User
     val chatInstance: String
 }
 
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/LeftChatMember.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/LeftChatMember.kt
index dfd71fe71a..22a9def5f3 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/LeftChatMember.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/LeftChatMember.kt
@@ -5,4 +5,4 @@ import dev.inmo.tgbotapi.types.message.ChatEvents.abstracts.CommonEvent
 
 data class LeftChatMember(
     val user: User
-): CommonEvent
+) : CommonEvent
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/PreCheckoutQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/PreCheckoutQuery.kt
index 742e184d96..dfdfe4a1a7 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/PreCheckoutQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/PreCheckoutQuery.kt
@@ -1,5 +1,6 @@
 package dev.inmo.tgbotapi.types.payments
 
+import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.types.*
 import dev.inmo.tgbotapi.types.payments.abstracts.*
 import kotlinx.serialization.SerialName
@@ -11,7 +12,7 @@ data class PreCheckoutQuery(
     @SerialName(idField)
     val id: PreCheckoutQueryId,
     @SerialName(fromField)
-    val user: User,
+    override val user: User,
     @SerialName(currencyField)
     override val currency: Currency,
     @SerialName(totalAmountField)
@@ -22,4 +23,4 @@ data class PreCheckoutQuery(
     val shippingOptionId: ShippingOptionIdentifier? = null,
     @SerialName(orderInfoField)
     val orderInfo: OrderInfo? = null
-) : Currencied, Amounted
+) : Currencied, Amounted, FromUser
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/ShippingQuery.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/ShippingQuery.kt
index dfa1735728..7821211bf6 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/ShippingQuery.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/payments/ShippingQuery.kt
@@ -1,5 +1,6 @@
 package dev.inmo.tgbotapi.types.payments
 
+import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.types.*
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
@@ -9,9 +10,9 @@ data class ShippingQuery(
     @SerialName(idField)
     val id: ShippingQueryIdentifier,
     @SerialName(fromField)
-    val user: User,
+    override val user: User,
     @SerialName(invoicePayloadField)
     val invoicePayload: InvoicePayload,
     @SerialName(shippingAddressField)
     val shippingAddress: ShippingAddress
-)
+) : FromUser
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/PollAnswer.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/PollAnswer.kt
index d0e32260af..c4ea74bfa0 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/PollAnswer.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/PollAnswer.kt
@@ -1,5 +1,6 @@
 package dev.inmo.tgbotapi.types.polls
 
+import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.types.*
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
@@ -9,7 +10,7 @@ data class PollAnswer(
     @SerialName(pollIdField)
     val pollId: PollIdentifier,
     @SerialName(userField)
-    val user: User,
+    override val user: User,
     @SerialName(optionIdsField)
     val chosen: List<Int>
-)
+) : FromUser
diff --git a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
index a425707050..b8901c90e6 100644
--- a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
+++ b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
@@ -3,6 +3,7 @@
 package dev.inmo.tgbotapi.extensions.utils
 
 import dev.inmo.tgbotapi.CommonAbstracts.CommonSendInvoiceData
+import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.requests.send.payments.SendInvoice
 import dev.inmo.tgbotapi.types.*
 import dev.inmo.tgbotapi.types.CallbackQuery.*
@@ -3096,3 +3097,12 @@ inline fun CommonSendInvoiceData.asInputInvoiceMessageContent(): InputInvoiceMes
 @PreviewFeature
 inline fun CommonSendInvoiceData.requireInputInvoiceMessageContent(): InputInvoiceMessageContent =
     this as InputInvoiceMessageContent
+
+@PreviewFeature
+inline fun <T> Any.whenFromUser(block: (FromUser) -> T) = asFromUser() ?.let(block)
+
+@PreviewFeature
+inline fun Any.asFromUser(): FromUser? = this as? FromUser
+
+@PreviewFeature
+inline fun Any.requireFromUser(): FromUser = this as FromUser
diff --git a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
index 153cbe2600..49493e952f 100644
--- a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
+++ b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/extensions/UpdateChatRetriever.kt
@@ -1,6 +1,10 @@
 package dev.inmo.tgbotapi.extensions.utils.extensions
 
+import dev.inmo.tgbotapi.extensions.utils.asFromUser
+import dev.inmo.tgbotapi.extensions.utils.asFromUserMessage
+import dev.inmo.tgbotapi.extensions.utils.asUser
 import dev.inmo.tgbotapi.extensions.utils.shortcuts.chat
+import dev.inmo.tgbotapi.types.User
 import dev.inmo.tgbotapi.types.chat.abstracts.Chat
 import dev.inmo.tgbotapi.types.update.*
 import dev.inmo.tgbotapi.types.update.MediaGroupUpdates.*
@@ -24,3 +28,6 @@ fun Update.sourceChat(): Chat? = when (this) {
     is ShippingQueryUpdate -> data.user
     else -> null
 }
+
+@PreviewFeature
+fun Update.sourceUser(): User? = data.asFromUser()?.user ?: sourceChat()?.asUser()